Hi Patrick, The program IGYCRCTL is IBM cobol compiler. As you see in step: //COB2 EXEC PGM=IGYCRCTL,REGION=4M,COND=(99,LT,DEFVSAM), // PARM=('APOST,DYN,RES,SOURCE,MAP,LIST,XREF') //STEPLIB DD DSN=&COMPLIB,DISP=SHR STEPLIB should be point to your ...