ERRORSYS.PRG Not compatible with S'87. Clipper Version 1.29 dtd 04/15/91. Problem Statement Clipper 5.0's ERRORSYS.PRG is incompatible with S'87 routines. Work Around(s) Use the new ErrorSys. Note: You may wish to download ERS501.ZIP from Nanforum for S'87 to 5.01 compatibilty solutions.