In this post, you’ll learn about the COBOL runtime Error Code 129 and the reason why you are receiving it
COBOL Error Code :
129
Reason for this Error in COBOL
Attempt to access record zero of relative file (Recoverable) -The value specified in the RELATIVE KEY data item contains the value zero. -You should ensure that the value in the RELATIVE KEY data item is greater than zero, then continue to run your program.