# Media Management Service API error messages

This section provides information about the error messages returned by the Media Management Service API methods.

### GetList

The following table describes the error messages returned by `GetList` and `callback` for `GetList` as part of their return value.

Table: GetList error messages
Error message | Description
--- | ---
`MediaMgmt:GetList:Server busy` | The provider is busy processing another request.
`MediaMgmt:GetList:Type Missing` | The `Type` property is missing from the input.
`MediaMgmt:GetList:Type not supported(should be FileInfo)` | The content type is invalid.
`MediaMgmt:GetList:Filter parameter missing` | The `Filter` property is missing from the input.
`MediaMgmt:GetList:Filter parameter type mismatch` | The type of the `Filter` property is invalid.
`MediaMgmt:GetList:Sort parameter type mismatch` | The type of the `Sort` property is invalid.
`MediaMgmt:GetList:FileType missing in Filter map` | Either the `FileType` property is not present in the `Filter` map or the `FileType` property contains a value with an invalid type.

### Cancel

The following table describes the error messages returned by `Cancel` as part of its return value.

Table: Cancel error messages
Error message | Description
--- | ---
`MediaMgmt:Cancel:Invalid TransactionID` | Either an invalid `TransactionID` was passed or an asynchronous call associated with this ID has already been completed.
`MediaMgmt:Cancel:Transaction ID missing` | The `TransactionID` property is missing from the input.