CNTL_ERROR when calling a SAP function

Hi,
I've been using for some time .NET SAP Connector to create client and server proxies.
A collegue of mine has created an RFC that is called
Z_YODA_CREATE_PM_NOTIFICATION.
After using the wizard to create the C# proxy I call the function and I get this exception:
SAP.Connector.RfcSystemException: Exception condition "CNTL_ERROR" raised.
   at SAP.Connector.SAPConnection.ThrowRfcException(RFC_ERROR_INFO_EX rfcerrInfo, Encoding encoding, String languangeCode)
   at SAP.Connector.SAPClient.RfcInvoke(String method, Object[] methodParamsIn)
   at SAP.Connector.SAPClient.SAPInvoke(String method, Object[] methodParamsIn)
   at SAPProxyDll1.SAPProxyDll1.Z_YODA_CREATE_PM_NOTIFICATION(String CODE, String DATE, String EQUNR, String HOUR, String PC, String USER, String& ADITIONAL_PARAM)
My collegue is able to call this function from excel using VBA and no exception is throwned, and the function runs correctly.
Is this .NET Connector fault? Am I doing something wrong?
Thanks in advance for any help given,
Luis Pinho

Hi,
Can you please give a detailed description on what the function module does and how it does? A piece of your VBA code that works?
Regards,
Guangwei

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Travis M
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CNTL_ERROR when calling a SAP function

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