S0C9 divide exception

S0C9 is a fixed-point divide exception: the program divided a binary field by zero (or the quotient overflowed).

What it means

• Integer division by zero in a COMP field raises S0C9.
• It can also fire when the quotient does not fit the result field.

Common causes

• Divisor field is zero because input data had zeros or spaces.
• Divisor never initialized.
• Quotient larger than the receiving field allows.

How to diagnose

• Locate the DIVIDE statement; display the divisor value at failure.
• Trace where the divisor is populated — file, calculation, or parameter.

How to fix it

• Test the divisor for zero before dividing.
• Validate input data so zero divisors are rejected or defaulted.

Example: Never divide without a zero test

A zero test before DIVIDE eliminates S0C9.

Interview tip

• Q: How would you troubleshoot a S0C9 divide exception in production?
• A: I would display the divisor at failure, trace its source, and add a zero test plus input validation.

Prevention checklist

• Validate divisors from external data.
• Add ON SIZE ERROR to DIVIDE.