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ICETOOL has an option NOTEMPTY which return RC 12 if the provided input file is empty.

//STEP01 EXEC PGM=ICETOOL
//SYSPRINT DD SYSOUT=*
//INFILE DD DISP=SHR,DSN=YOUR.INPUT.FILE
//TOOLMSG DD SYSOUT=*
//COUNTCT2 DD SYSOUT=*
//DFSMSG DD SYSOUT=*
//TOOLIN DD *
COUNT FROM(INFILE) NOTEMPTY
//*

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