ActiveX Library Error Codes
The ActiveX Library functions return negative values when they detect errors. This library uses a common set of error codes. The following table lists the error codes, defined constants, and error messages associated with functions in the the LabWindows/CVI ActiveX Library.
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Note Occasionally, an ActiveX Library function returns an error code because an internal call to a Windows function returns the error code. The following table does not list such error codes; however, you can refer to <Program Files>\National Instruments\Shared\MSDTRedistributables\SDKHeaderFiles\8.1\winerror.h for the Windows error code. |
Use the CA_GetAutomationErrorString function to convert the error code, returned in the Result parameter of ActiveX Library functions, into meaningful error messages. You then can use CA_DisplayErrorInfo to display the description of an error code.
Error codes are defined in the CVIversion\include\cviauto.h or in <Program Files>\National Instruments\Shared\MSDTRedistributables\SDKHeaderFiles\8.1\winerror.h files.
ActiveX Library Error Codes
| Code | Defined Constant | Description |
| 0X0 | E_CVIAUTO_NO_ERROR | The operation completed successfully. |
| 0X80040201 | E_CVIAUTO_INVALID_TYPE_DESC | The type you passed is an invalid ActiveX data type. |
| 0X80040202 | E_CVIAUTO_INVALID_RETURN_TYPE | The type you passed is an invalid return type. |
| 0X80040203 | E_CVIAUTO_USE_CAVT_TYPE_DESC | Use CAVT_ constants for data types instead of VT_ constants. |
| 0X80040204 | E_CVIAUTO_INVALID_NUM_DIM | The number of dimensions in the safe array does not match the number this function requires. |
| 0X80040205 | E_CVIAUTO_DIFF_SAFEARRAY_TYPE | The safe array type does not match the type you requested. |
| 0X80040206 | E_CVIAUTO_VARIANT_NOT_SAFEARRAY | The variant does not contain a safe array. |
| 0X80040207 | E_CVIAUTO_NULL_RET_VAL_PARAM | The return value parameter must not be NULL. |
| 0X80040208 | E_CVIAUTO_DLL_LOAD_FAILED | Could not load the CVI Automation Support DLL (cviauto.dll). |
| 0X80040209 | E_CVIAUTO_BAD_DLL_VERSION | CVI Automation Support DLL (cviauto.dll) version does not match the import library. |
| 0X8004020a | E_CVIAUTO_COULD_NOT_CREATE_MUTEX | Unable to create a required mutex. |
| 0x8004020b | E_CVIAUTO_WRONG_THREAD | You can call this function only from the thread that created the CAObjHandle. |
| 0x8004020c | E_CVIAUTO_NO_CALLBACKS | The object has no registered event callbacks. |
| 0x8004020d | E_CVIAUTO_INVALID_CALLBACKID | Invalid callback ID. |
| 0x8004020e | E_CVIAUTO_CALLBACK_REGISTERED | This event already has a registered callback. |
| 0x8004020f | E_CVIAUTO_CALLBACK_NOT_REGISTERED | This event does not have a registered callback. |
| 0x80040210 | E_CVIAUTO_INVALID_METHOD_INDEX | Invalid event method index. |
| 0x80040211 | E_CVIAUTO_INVALID_INTERFACE_PTR | Invalid ActiveX interface pointer. |
| 0x80040212 | E_CVIAUTO_SERVER_NOT_INITIALIZED | The automation server was not initialized. |
| 0x80040213 | E_CVIAUTO_SERVER_INVALID_TYPE | The module type is invalid. |
| 0x80040214 | E_CVIAUTO_SERVER_INPROC_ONLY | This operation is only permitted on in-process (DLL) servers. |
| 0x80040215 | E_CVIAUTO_SERVER_NOT_AUTOMATION | The server was not launched for automation. |
| 0x80040216 | E_CVIAUTO_SERVER_INVALID_AGGREG | Aggregation is only allowed during object creation. |
| 0x80040217 | E_CVIAUTO_SERVER_IFACE_NOT_AGGREG | This interface is already implemented or aggregated by this object. |
| 0x80040218 | E_CVIAUTO_SERVER_INITIALIZATION | Server initialization error. |
| 0x80040219 | E_CVIAUTO_SERVER_CLASS_NOT_REG | The class is not registered internally with the Automation Support DLL. |
| 0x80040220 | E_CVIAUTO_CVI_UI_ERROR | A User Interface Library error occurred. |
| 0x80040221 | E_CVIAUTO_SERVER_OBJ_NO_ERRORINFO | This object does not implement the ISupportErrorInfo interface. |
| 0x80040222 | E_CVIAUTO_SERVER_ITF_NO_ERRORINFO | This interface does not support ErrorInfo. |
| 0x80040223 | E_CVIAUTO_SERVER_IN_CALLBACK | This function cannot be called from the server or object callback. |