After adding many thousand secondary indexed records through master then the index can become corrupt.
VERIFY FILE reports Index PTBYNAME ***ERROR - data count mismatch LEVEL 1 PRU - 25 ENTRIES - 2 COUNT - 2603 CURRENT ENTRY - 2 LEVEL 2 PRU - 358 ENTRIES - 84 COUNT - 23 CURRENT ENTRY - 39 Datablock count - 0 Datablock pru - 229