A validation error was received from the Planning server

Hi,

I receive the bellow error when validating my script.

DATACOPY &OEP_CurMnth->&OEP_CurYr->"OEP_Actual" TO "OEP_Yearly Plan"->(@ismbr(@MEMBER(@shiftsibling(&OEP_NextYear,2))))->"OEP_Plan";