RFC_INVALID_PARAMETER - An invalid Tablehandle was passedto the API Call

Hello,

In my Data Service job, there is a dataflow which makes a call to a custom function (Z_***) and passes a date time stamp as In Value Parameter. The function call works fine in DEV environment but fails with the following error in QA envrionment. What could be the possible root cause for this error?

Thanks.

R3C-150418: |Data flow DF_TestDataFlow|Transform FunctionCallQuery-Function1 RFC function call GetResult failed: <RFC_INVALID_PARAMETER- An invalid table handle was passed to the API call>.