C6103
Note
This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
warning C6103: Returning <variable> from failed function call at line <location>.
A successful path through the function is returning a variable that was used as an _Out_ parameter to an internal function call that failed.
The problem might be that the called function and the calling function are not completely annotated. The called function may require _Always_, _Outptr_result_nullonfailure_ (_COM_Outptr_ for COM code), or a related annotation, and the calling function may require a _Success_ annotation. Another possible cause for this warning is that the _Success_ annotation on the called function is incorrect.