When a logical or physical error occurs during processing that involves alternate indexes, VSAM provides a code in the RPLCMPON field that indicates whether the base cluster, its alternate index, or its upgrade set was being processed and whether upgrading was satisfactory or may have been incorrect because of the error (see Table 1).
| Code | What Was Being Processed | Status of Upgrading |
|---|---|---|
| 0(X'00') | Base cluster | Satisfactory. |
| 1(X'01') | Base cluster | May be incorrect. |
| 2(X'02') | Alternate index | Satisfactory. |
| 3(X'03') | Alternate index | May be incorrect. |
| 4(X'04') | Upgrade set | Satisfactory. |
| 5(X'05') | Upgrade set | May be incorrect. |