👁 0
Q: What causes S0C7 abend and how to fix it?
Answer:
S0C7 (Data Exception) occurs when non-numeric data is used in numeric operations. Common causes: uninitialized fields, incorrect data from files, wrong REDEFINES. Fix by: initializing variables, validating input data, using INSPECT/NUMVAL functions, checking file data quality.
👁 0
Q: How does INSPECT work?
Answer:
INSPECT examines/modifies string contents. INSPECT field TALLYING counter FOR ALL 'X'. INSPECT field REPLACING ALL 'A' BY 'B'. INSPECT field CONVERTING 'abc' TO '123'. Useful for data validation, transformation, and counting characters.
👁 0
Q: How to handle EBCDIC/ASCII conversion?
Answer:
COBOL on mainframe uses EBCDIC natively. For ASCII conversion: use INSPECT CONVERTING, or file translation (JCL), or LE functions. NATIONAL-OF and DISPLAY-OF for Unicode. Different collating sequences affect SORT and comparisons.
👁 0
Q: What is NATIVE-BCD?
Answer:
NATIVE-BCD is native binary-coded decimal, digits stored one per byte. Less efficient than COMP-3 but simpler to inspect in dumps. Some shops prefer for debugging. Available through compiler options or USAGE clause variations.
👁 0
Q: What is TALLY special register?
Answer:
TALLY is predefined counter for EXAMINE (obsolete verb). Some code still references it. INSPECT replaced EXAMINE. Not recommended for new code. TALLY is global, can conflict. Define your own counters instead.