The string argument passed to system() started with "PGM=" indicating an MVS™ program name. There was at least 1 additional character, but less than 6, following the program name. This does not allow for the ",PARM=" syntax for specifying parameters.
Correct the string argument. When specifying an MVS program with parameters, the required syntax is: "PGM=program-name,PARM='program-parameters'" Note that the program-name must be a valid MVS program name.
JrEdcSys_Esystem02