PRC: Interface Invoices to Receivables - Error ORA-1422 exact fetch returns more than requested numb

Hi 

We are currently experiencing the above error when trying to run the  PRC: Interface Invoices to Receivables, I have found an explanation of this error but not how to fix it / stop it.  Has anyone else experienced this before? any advise on how to fix?

Any information would be very much appreciated.

The 2 notes I have so far found and read are ID 18827.1, Note:22080.1

Thanks

Ruby

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production