The last record in every index block must be a star-key record that points to a block that continues the path to all data not covered by the preceding records in the block. Star-key records have a unique format with a size of seven (7), or eight (8), depending on the platform, and a compression count of zero (0). The errors discussed in this section indicate a missing or damaged star-key and may be attacked with two strategies.

In general, you should turn the last existing record into a star-key. This works well as long as the block holds at least one valid record. If you choose this strategy, locate the last record using DUMP RECORD=9999. Then DUMP the last record and note its pointer. Next, REMOVE the last record. Finally, ADD STAR POINTER= to the key you noted.

If the star-key is the only record in a root block, you should add a new empty level 0 descendent. If you choose this strategy, add a new star-key using FIND FREEBLOCK HINT=this-block to locate a nearby block. Next, MAP the new block BUSY and CHANGE LEVEL= 0 and BSIZ=7(or 8, if your platform dictates). If the new block has a level of zero (0), return to the damaged block and ADD STAR POINTER=the-first-new-block.