When your program receives control after it has issued a CLOSE macro, a return code in register 15 indicates whether all data sets were closed successfully.
The CLOSE return codes are:
| Return Code (15) | Meaning |
|---|---|
| 0(X'0') | All data sets were closed successfully. |
| 4(X'4') | At least one data set (VSAM or non-VSAM) was not closed successfully. |