ORA-26029

Error: ORA-26029: index string.string partition string initially in unusable state

Causa: A partition of an index is in IU state prior to the beginning of a direct path load, it cannot be maintained by the loader.

Acción: Either rebuild index partition, re-create the index, or use either SKIP_UNUSABLE_INDEXES or SKIP_INDEX_MAINTENANCE (SQL*Loader only).