diff -r 2455ef1f5bbc -r d5e927d5853b javaextensions/datagram/datagram/src/nativedatagramconnection.cpp
--- a/javaextensions/datagram/datagram/src/nativedatagramconnection.cpp	Wed Sep 01 12:33:18 2010 +0100
+++ b/javaextensions/datagram/datagram/src/nativedatagramconnection.cpp	Tue Sep 14 21:06:50 2010 +0300
@@ -133,6 +133,7 @@
         writeBuffer = new char[requiredNativeBufferLength + 1];
     }
     /* Copy the data to be written from java buffer to the native buffer.  */
+    if (writeBuffer != NULL)
     JNIArrayUtils::CopyToNative(aJni, aJavaBuffer, aOffset,
                                 requiredNativeBufferLength, writeBuffer);