<h1>KERN-EXEC</h1>

<p>

These panics represent program errors which are detected by the Kernel

Executive. Typically, they are caused by passing bad or contradictory

parameters to functions. Threads which cause exceptions also raise a KERN-EXEC

panic. 

</p>

<p>

The thread causing the panic is terminated. 

</p>

<code>0</code>

<p>

This panic is raised when the Kernel cannot find an object in the

object index for the current process or current thread using the specified

object index number (the raw handle number). 

</p>

<p>

The most common reason for this is trying to use a kernel-side

resource without first having sucessfully created it or sucessfully opened it.

Typically, such resources are created or opened through user side handles,

which are instances of classes derived from <a href="../reference-cpp/E32_EKA2/RHandleBaseClass.html#%3a%3aRHandleBase" title="class RHandleBase"><code class="ApiItem">RHandleBase</code></a>,

for example, <a href="../reference-cpp/E32_EKA2/RLibraryClass.html#%3a%3aRLibrary" title="class RLibrary"><code class="ApiItem">RLibrary</code></a>, <a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread" title="class RThread"><code class="ApiItem">RThread</code></a>,

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess" title="class RProcess"><code class="ApiItem">RProcess</code></a>, <a href="../reference-cpp/E32_EKA2/RSemaphoreClass.html#%3a%3aRSemaphore" title="class RSemaphore"><code class="ApiItem">RSemaphore</code></a> etc. [Note that

this list is not exhaustive].

</p>

<p>

For example, a call to <a href="../reference-cpp/E32_EKA2/RLibraryClass.html#%3a%3aRLibrary%3a%3aLookup%28%29" title="function RLibrary::Lookup()"><code class="ApiItem">RLibrary::Lookup()</code></a>

panics with KERN-EXEC 0 if not preceded by a successful call to

<a href="../reference-cpp/E32_EKA2/RLibraryClass.html#%3a%3aRLibrary%3a%3aLoad%28%29" title="function RLibrary::Load()"><code class="ApiItem">RLibrary::Load()</code></a>. 

</p>

<code>1</code>

<p>

This is a general panic raised as a result of trying an

unauthorised activity such as trying to suspend a thread, to set the priority

of a thread or to set the priority of a process, when not authorised to do so. 

</p>

<code>2</code>

<p>

This panic is raised by the kernel when opening a kernel side

object, a <a href="../reference-cpp/E32_EKA2/DObjectClass.html#%3a%3aDObject" title="class DObject"><code class="ApiItem">DObject</code></a> type, and the fullname is invalid. 

</p>

<p>

The fullname is deemed to be invalid if it contains a character

that is not one of the printable characters lying between 0x20 and 0x7e

inclusive, or it contains an asterisk or a question mark. 

</p>

<p>

See also <a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aValidateFullName%28%29" title="function Kern::ValidateFullName()"><code class="ApiItem">Kern::ValidateFullName()</code></a>. 

</p>

<code>3</code>

<p>

This panic is raised when an unhandled exception occurs. Exceptions

have many causes, but the most common are access violations caused, for

example, by dereferencing NULL. Among other possible causes are: general

protection faults, executing an invalid instruction, alignment checks, etc. 

</p>

<code>4</code>

<p>

This panic is not used. 

</p>

<code>5</code>

<p>

This panic is not used. 

</p>

<code>6</code>

<p>

This panic is raised by the kernel when a handle to a code segment

is invalid. 

</p>

<code>7</code>

<p>

This panic is not used. 

</p>

<code>8</code>

<p>

This panic is not used. 

</p>

<code>9</code>

<p>

This is a general type of panic that is usually raised by a device

driver when dealing with an asynchronous request, and it finds that an

asynchronous request is already outstanding. For an example of the context in

which this is raised, see

<code class="filename">...\cedar\e32test\examples\driver1\driver1_ldd.cpp</code>. 

</p>

<p>

This panic is also raised when trying to subscribe to a property

through a call to <a href="../reference-cpp/E32_EKA2/RPropertyClass.html#%3a%3aRProperty%3a%3aSubscribe%28%29" title="function RProperty::Subscribe()"><code class="ApiItem">RProperty::Subscribe()</code></a> and there is

already an outstanding subscription on this property handle. 

</p>

<code>10</code>

<p>

This panic is raised by

<a href="../reference-cpp/E32_EKA2/DLogicalChannelClass.html#%3a%3aDLogicalChannel%3a%3aRequest%28%29" title="function DLogicalChannel::Request()"><code class="ApiItem">DLogicalChannel::Request()</code></a> when the request number passed

to the function is smaller than the permitted minimum. 

</p>

<p>

See also <a href="../reference-cpp/E32_EKA2/DLogicalChannelClass.html#%3a%3aDLogicalChannel%3a%3aEMinRequestId" title="field DLogicalChannel::EMinRequestId"><code class="ApiItem">DLogicalChannel::EMinRequestId</code></a>. 

</p>

<code>11</code>

<p>

This panic is raised when creating a logical channel, and the unit number is outside the permitted range: 

</p>

<p>

If unit numbers are not permitted, the unit number value must

be <a href="../reference-cpp/E32_EKA2/e32const.hVariables.html#%3a%3aKNullUnit" title="field KNullUnit"><code class="ApiItem">KNullUnit</code></a>. 

</p>

<p>

If unit numbers are permitted, the unit number value must be

less than <a href="../reference-cpp/E32_EKA2/e32const.hVariables.html#%3a%3aKMaxUnits" title="field KMaxUnits"><code class="ApiItem">KMaxUnits</code></a>. 

</p>

<p>

A logical channel is created as a result of a call to

<a href="../reference-cpp/E32_EKA2/RBusLogicalChannelClass.html#%3a%3aRBusLogicalChannel%3a%3aDoCreate%28%29" title="function RBusLogicalChannel::DoCreate()"><code class="ApiItem">RBusLogicalChannel::DoCreate()</code></a>. 

</p>

<code>12</code>

<p>

This panic is raised by the kernel if an event capture hook has already been designated. 

</p>

<code>13</code>

<p>

This panic is raised by the kernel if the current thread is not the designated event capture hook. 

</p>

<code>14</code>

<p>

This panic is raised when an attempt is made to set the priority of

a thread or process to an illegal value. 

</p>

<p>

The permitted priority values for a user process are a subset of

the values defined by the <a href="../reference-cpp/E32_EKA2/TProcessPriorityEnum.html#%3a%3aTProcessPriority" title="enum TProcessPriority"><code class="ApiItem">TProcessPriority</code></a> enum. The

permitted values are: 

</p>

<code> EPriorityLow

</code>

<p>

<code>EPriorityBackground

</code>

</p>

<p>

<code>EPriorityForeground

</code>

</p>

<p>

<code>EPriorityHigh

</code>

</p>

<p>

The permitted priority values for a user thread are a subset of the

values defined by the <a href="../reference-cpp/E32_EKA2/TThreadPriorityEnum.html#%3a%3aTThreadPriority" title="enum TThreadPriority"><code class="ApiItem">TThreadPriority</code></a> enum. The permitted

values are: 

</p>

<p>

<code> EPriorityMuchLess

</code>

</p>

<p>

<code> EPriorityLess

</code>

</p>

<p>

<code> EPriorityNormal

</code>

</p>

<p>

<code>EPriorityMore

</code>

</p>

<p>

<code> EPriorityMuchMore

</code>

</p>

<code>EPriorityRealTime

</code>

</p>

<p>

<code>EPriorityAbsoluteVeryLow

</code>

</p>

<p>

<code> EPriorityAbsoluteLow

</code>

</p>

<p>

<code> EPriorityAbsoluteBackground

</code>

</p>

<p>

<code> EPriorityAbsoluteForeground

</code>

</p>

<p>

<code> EPriorityAbsoluteHigh

</code>

</p>

<code>15</code>

<p>

This panic is raised when a timer event is requested from an

asynchronous timer service, an <a href="../reference-cpp/E32_EKA2/RTimerClass.html#%3a%3aRTimer" title="class RTimer"><code class="ApiItem">RTimer</code></a>, and a timer event

is already outstanding. It is caused by calling either the <code>At()</code>,

<code>After()</code> or <code>Lock()</code> member functions after a previous

call to any of these functions, but before the timer event requested by those

functions has completed. 

</p>

<code>16</code>

<p>

This panic is not used. 

</p>

<code>17</code>

<p>

The panic is raised if kernel heap checking has failed. 

</p>

<code>18</code>

<p>

This panic is not used. 

</p>

<code>19</code>

<p>

This panic is raised by the Kernel when a server program makes a

request to receive a message, i.e. when it calls the <code>Receive()</code>

member function of <code>RServer2</code>, the handle to the Kernel side server

object. The panic occurs when a receive message request has previously been

made and is still outstanding. 

</p>

<p>

Note that <code>RServer2</code> is internal to Symbian 

</p>

<code>20</code>

<p>

This panic is raised by the Kernel when a request for an event, as

originated by a call to <code>UserSvr::RequestEvent()</code>, defined in

<code class="filename">e32svr.h</code>, is made while a previously made request is still

outstanding. 

</p>

<code>21</code>

<p>

This panic is not used. 

</p>

<code>22</code>

<p>

This panic is not used. 

</p>

<code>23</code>

<p>

This panic is raised in a call to

<a href="../reference-cpp/E32_EKA2/RSessionBaseClass.html#%3a%3aRSessionBase%3a%3aShareAuto%28%29" title="function RSessionBase::ShareAuto()"><code class="ApiItem">RSessionBase::ShareAuto()</code></a> or

<a href="../reference-cpp/E32_EKA2/RSessionBaseClass.html#%3a%3aRSessionBase%3a%3aShareProtected%28%29" title="function RSessionBase::ShareProtected()"><code class="ApiItem">RSessionBase::ShareProtected()</code></a>, i.e. when attempting to

create a session with a server that can be shared, and the server does not

allow or support shared sessions. 

</p>

<code>24</code>

<p>

This panic is raised when writing global DLL data, and the length

of data to be written is greater than the space available. 

</p>

<code>25</code>

<p>

This panic is raised when searching for objects, using the internal

function <code>TFindHandleBase::NextObject()</code>, and an invalid type of

object is specified; i.e. it is not a thread, process, chunk, mutex etc. etc. 

</p>

<code>26</code>

<p>

This panic is raised by kernel side code that implements heap

debugging behaviour, when a specific debug request is not recognised. 

</p>

<code>27</code>

<p>

This panic is raised when an executive call is made with an invalid

call number. 

</p>

<code>28</code>

<p>

This panic is not used. 

</p>

<code>29</code>

<p>

This panic is not used. 

</p>

<code>30</code>

<p>

This panic is raised when an attempt is being made to send a

synchronous message to a server more than once, using the current thread's

dedicated synchronous message. 

</p>

<code>31</code>

<p>

This panic is not used. 

</p>

<code>32</code>

<p>

This panic is called by <code>DProcess::Resume()</code> when trying

to resume a process that is still being loaded. 

</p>

<code>33</code>

<p>

This panic is raised in a call to

<a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesInfo%28%29" title="function Kern::KUDesInfo()"><code class="ApiItem">Kern::KUDesInfo()</code></a>, <a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesPut%28%29" title="function Kern::KUDesPut()"><code class="ApiItem">Kern::KUDesPut()</code></a>

etc, when an invalid descriptor is passed. 

</p>

<code>34</code>

<p>

This panic is raised in a call to

<a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesSetLength%28%29" title="function Kern::KUDesSetLength()"><code class="ApiItem">Kern::KUDesSetLength()</code></a> &amp;

<a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesPut%28%29" title="function Kern::KUDesPut()"><code class="ApiItem">Kern::KUDesPut()</code></a> when the descriptor passed to it is not a

modifiable type; i.e. is derived from <a href="../reference-cpp/E32_EKA2/TDesCTypedef.html#%3a%3aTDesC" title="typedef TDesC"><code class="ApiItem">TDesC</code></a> but not

derived from <a href="../reference-cpp/E32_EKA2/TDesTypedef.html#%3a%3aTDes" title="typedef TDes"><code class="ApiItem">TDes</code></a>. 

</p>

<code>35</code>

<p>

This panic is raised in a call to

<a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesSetLength%28%29" title="function Kern::KUDesSetLength()"><code class="ApiItem">Kern::KUDesSetLength()</code></a> &amp;

<a href="../reference-cpp/E32_EKA2/KernClass.html#%3a%3aKern%3a%3aKUDesPut%28%29" title="function Kern::KUDesPut()"><code class="ApiItem">Kern::KUDesPut()</code></a> when the length of the source descriptor

is longer than the maximum length of the target descriptor. 

</p>

<code>36</code>

<p>

This panic is raised by the kernel side code that implements the

setting of the currency symbol when the length of the currency symbol is

greater than <a href="../reference-cpp/E32_EKA2/e32const.hVariables.html#%3a%3aKMaxCurrencySymbol" title="field KMaxCurrencySymbol"><code class="ApiItem">KMaxCurrencySymbol</code></a>. 

</p>

<code>37</code>

<p>

This panic is raised by kernel code when it tries to acquire the

process DLL lock just before a load, and the wait DLL lock is invalid. 

</p>

<code>38</code>

<p>

This panic is raised by internal kernel code when an illegal

attempt is made to attach to a library. 

</p>

<code>39</code>

<p>

This panic is raised when extracting a list of DLL entry points,

and the number exceeds the maximum permitted. 

</p>

<code>40</code>

<p>

This panic is raised by internal kernel code when an illegal

attempt is made to detach a library. 

</p>

<code>41</code>

<p>

This panic is raised by internal kernel code when an illegal

attempt is made to attach to a library. 

</p>

<code>42</code>

<p>

This panic is raised by internal kernel code when an illegal

attempt is made to detach a library. 

</p>

<code>43</code>

<p>

This panic is raised by kernel code when it tries to release the

process DLL lock when a load fails, and the release DLL lock is invalid. 

</p>

<code>44</code>

<p>

This panic is raised when a bad message handle is passed to the

kernel. This usually occurs when using functions called on the

<a href="../reference-cpp/E32_EKA2/RMessagePtr2Class.html#%3a%3aRMessagePtr2" title="class RMessagePtr2"><code class="ApiItem">RMessagePtr2</code></a> or <a href="../reference-cpp/E32_EKA2/RMessage2Class.html#%3a%3aRMessage2" title="class RMessage2"><code class="ApiItem">RMessage2</code></a> classes

after the message has been completed; or when the <code>iHandle</code> data

member of the base class <a href="../reference-cpp/E32_EKA2/RHandleBaseClass.html#%3a%3aRHandleBase" title="class RHandleBase"><code class="ApiItem">RHandleBase</code></a> has become corrupt. 

</p>

<code>45</code>

<p>

This panic is not used. 

</p>

<code>46</code>

<p>

This panic can be raised as a result of a call to one of a large

number of functions. In general, the panic indicates an attempt to perform an

operation on a thread or process by code running in another process - violating

the security principle of process isolation. 

</p>

<p>

There are exceptions to this general rule, for example, where the

panic is raised because the calling process has insufficient capability. The

precise reason is stated with the function(s). 

</p>

<p>

The panic is raised on a call to the following function if the

process owning the thread performing the call is not the creator of the target

process or, if a handle is specified, the handle is not local. 

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aSetParameter%28%29" title="function RProcess::SetParameter()"><code class="ApiItem">RProcess::SetParameter()</code></a>

</p>

<p>

The panic is raised on a call to the following functions if the

process owning the thread performing the call is not the same as the target

process. 

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aKill%28%29" title="function RProcess::Kill()"><code class="ApiItem">RProcess::Kill()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aTerminate%28%29" title="function RProcess::Terminate()"><code class="ApiItem">RProcess::Terminate()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aPanic%28%29" title="function RProcess::Panic()"><code class="ApiItem">RProcess::Panic()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aSetJustInTime%28%29" title="function RProcess::SetJustInTime()"><code class="ApiItem">RProcess::SetJustInTime()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RProcessClass.html#%3a%3aRProcess%3a%3aResume%28%29" title="function RProcess::Resume()"><code class="ApiItem">RProcess::Resume()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aKill%28%29" title="function RThread::Kill()"><code class="ApiItem">RThread::Kill()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aTerminate%28%29" title="function RThread::Terminate()"><code class="ApiItem">RThread::Terminate()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aPanic%28%29" title="function RThread::Panic()"><code class="ApiItem">RThread::Panic()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aSuspend%28%29" title="function RThread::Suspend()"><code class="ApiItem">RThread::Suspend()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aResume%28%29" title="function RThread::Resume()"><code class="ApiItem">RThread::Resume()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aSetPriority%28%29" title="function RThread::SetPriority()"><code class="ApiItem">RThread::SetPriority()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aRequestComplete%28%29" title="function RThread::RequestComplete()"><code class="ApiItem">RThread::RequestComplete()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/RThreadClass.html#%3a%3aRThread%3a%3aRequestSignal%28%29" title="function RThread::RequestSignal()"><code class="ApiItem">RThread::RequestSignal()</code></a>

</p>

<p>

NOTE: the creator of a new process can kill or panic the new

process, change the new process priority and set the new process startup

parameters until the process is resumed (which the creator can also do). After

the new process has been resumed, then it becomes totally independent of its

creator, and any attempt to panic it, kill it etc will raise the KERN-EXEC 46

panic. 

</p>

<p>

The panic is raised on call to the following (Symbian partner

only) functions if the calling process does not have the <em>PowerMgmt</em>

capability (<code class="ApiItem">TCapability::ECapabilityPowerMgmt</code>): 

</p>

<p>

<a href="../reference-cpp/E32_EKA2/PowerClass.html#%3a%3aPower%3a%3aPowerDown%28%29" title="function Power::PowerDown()"><code class="ApiItem">Power::PowerDown()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/PowerClass.html#%3a%3aPower%3a%3aEnableWakeupEvents%28%29" title="function Power::EnableWakeupEvents()"><code class="ApiItem">Power::EnableWakeupEvents()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/PowerClass.html#%3a%3aPower%3a%3aDisableWakeupEvents%28%29" title="function Power::DisableWakeupEvents()"><code class="ApiItem">Power::DisableWakeupEvents()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/PowerClass.html#%3a%3aPower%3a%3aRequestWakeupEventNotification%28%29" title="function Power::RequestWakeupEventNotification()"><code class="ApiItem">Power::RequestWakeupEventNotification()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/PowerClass.html#%3a%3aPower%3a%3aCancelWakeupEventNotification%28%29" title="function Power::CancelWakeupEventNotification()"><code class="ApiItem">Power::CancelWakeupEventNotification()</code></a>

</p>

<p>

The panic is raised on call to the following functions if the

calling process does not have the <em>WriteDeviceData</em> capability

(<code class="ApiItem">TCapability::ECapabilityWriteDeviceData</code>): 

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aSetMachineConfiguration%28%29" title="function User::SetMachineConfiguration()"><code class="ApiItem">User::SetMachineConfiguration()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aSetHomeTime%28%29" title="function User::SetHomeTime()"><code class="ApiItem">User::SetHomeTime()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aSetUTCTime%28%29" title="function User::SetUTCTime()"><code class="ApiItem">User::SetUTCTime()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aSetUTCOffset%28%29" title="function User::SetUTCOffset()"><code class="ApiItem">User::SetUTCOffset()</code></a>

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aSetUTCTimeAndOffset%28%29" title="function User::SetUTCTimeAndOffset()"><code class="ApiItem">User::SetUTCTimeAndOffset()</code></a>

</p>

<p>

The panic is raised on call to the following function if the

calling process does not have the <em>ReadDeviceData</em> capability

(<code class="ApiItem">TCapability::ECapabilityReadDeviceData</code>): 

</p>

<p>

<a href="../reference-cpp/E32_EKA2/UserClass.html#%3a%3aUser%3a%3aMachineConfiguration%28%29" title="function User::MachineConfiguration()"><code class="ApiItem">User::MachineConfiguration()</code></a>

</p>

<code>47</code>

<p>

This panic is raised when the user issues a request to be notified

of messages or the availability of space, when a request has already been

issued and is still outstanding. 

</p>

<p>

See <a href="../reference-cpp/E32_EKA2/RMsgQueueClass.html#%3a%3aRMsgQueue" title="class RMsgQueue"><code class="ApiItem">RMsgQueue</code></a>, asynchronous message queues. 

</p>

<code>48</code>

<p>

This panic is raised when creating a message queue, and the size of

the template parameter is invalid. 

</p>

<p>

See <a href="../reference-cpp/E32_EKA2/RMsgQueueClass.html#%3a%3aRMsgQueue" title="class RMsgQueue"><code class="ApiItem">RMsgQueue</code></a>, asynchronous message queues. 

</p>

<code>49</code>

<p>

This panic is raised when creating a message queue, and the

specified number of slots is not positive. 

</p>

<p>

See <a href="../reference-cpp/E32_EKA2/RMsgQueueClass.html#%3a%3aRMsgQueue" title="class RMsgQueue"><code class="ApiItem">RMsgQueue</code></a>, asynchronous message queues. 

</p>

<code>50</code>

<p>

This panic is raised if an attempt is made to cancel an outstanding

request to be notified of messages or the availability of space, and the cancel

is being made by a thread in a different process to the one from which the

request was originally made. 

</p>

<p>

See <a href="../reference-cpp/E32_EKA2/RMsgQueueClass.html#%3a%3aRMsgQueue" title="class RMsgQueue"><code class="ApiItem">RMsgQueue</code></a>, asynchronous message queues. 

</p>

<code>51</code>

<p>

This panic is raised by <code>RProcess::Setparameter()</code> if a

slot value is invalid. 

</p>