Have you tried:
USE mytable EXCLUSIVE
DELETE TAG ALL
?

>I am wondering is there is a way to programmatically remove an index tag (all tags) and erase a cdx file that is no longer needed. I tried, just for the heck of it, to see what would happen if I erased a cdx file that was part of a DBC. VFP did not like that very much and although I could use the VALIDATE DATABASE RECOVER command to fix it, this can't be used in a program. What do you do if a cdx file is accidentally deleted?