>Here are key details:
>
>1.) The cause of the index becoming corrupted or out of sync with table data remains unknown.
>
>2.) The table is created just a few lines earlier, and the index is a CDX index tag. As far as I know, CDXs are typically maintained automatically.
>
>3.) Despite the Error 20 being thrown, the output CSV was generated, and several thousand rows were successfully written to the file. Presumably the issue arose when FoxPro encountered the record with the corrupted index entry.
>
>4.) Upon inspecting the rows in the output CSV (both the shortened version before implementing REINDEX and the full one created after adding REINDEX), I haven't identified any anomalous data that would explain the occurrence of the problem.
>
>5.) I still need to examine the source table's data, but I'm currently running a test, so access to the data is temporarily unavailable.
>
>I hope this provides a clearer picture of the situation. If you have any insights or suggestions, please feel free to share.
>
>Thanks again!

Probably some timing / caching issues?
Is the index active, or will the export work with SET ORDER TO as well?
If no, try to create the INDEX after export.
Is this a table or a cursor? Just out of curiosity, why the table? It sounds like you create a table for later export? But this would mean to clean the OS?

And again, I would use a SQL SELCET to create the cursor and export this. You can order while creating, so you do not depend on SET ORDER. (For me, tables are just storage, any work is on cursors create via SQL SELECT, mostly by CA. Index is only to optimize SQL - and on the front end, so user might sort the grid on own need.)