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you can't go back to line 1. your loop needs to read both files B and C and print accordingly. Something like: READ FILEA 99 *IN99 DOWEQ'0' KEY CHAINFILEB 98 KEY CHAINFILEC 97 Use dou to ensure line always printed for filea *IN97 DOUEQ'1' *IN98 ANDEQ'1' EXCPTLINE *IN98 IFEQ '0' KEY READEFILEB 98 ENDIF *IN97 IFEQ'0' KEY READEFILEC 97 ENDIF ENDDO READ FILEA 99 ENDDO Your output specs need to then condition the output from records on FILEB and FILEC with indicators 97 and 98.
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