VSAM returns a code in register 15 that indicates whether the SHOWCAT request was successful. Table 1 describes these return codes.
| Return Code | Meaning |
|---|---|
| 0(X'00') | VSAM completed the task. |
| 4(X'04') | The area specified in the AREA operand is too small to display all pairs of fields for the associated objects. |
| 8(X'08') | There is insufficient virtual storage to complete the task. (A GETMAIN failed.) |
| 12(X'0C') | Either the ACB address is invalid, or the VSAM master catalog does not exist, or it is not open. |
| 16(X'10') | The address specified in the AREA operand is outside the partition or address space of the program that issued SHOWCAT. |
| 20(X'14') | The named object or control interval does not exist. |
| 24(X'18') | There was an I/O error in gaining access to the catalog. |
| 28(X'1C') | The control interval number is invalid. |
| 32(X'20') | The catalog record does not describe a C, D, G, I, R, or Y type of object. |
| 36(X'24') | The interrelationship among catalog entries is in error. For example, another type. |
| 40(X'28') | There was an unexpected error code returned from catalog management to the SHOWCAT processor. |