>>Yes they are created with create cursor the sql command. I find the program has problems when when I use the requery method for the two list boxes. For a while, they both requery fine, but after moving list items between the two boxes, I get an index internal inconsistency error and an Internal resource manager error. Could these errors possibly be caused by disk space or insufficient memory even though I have plenty of disk space and memory?
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>Try to unlink list (Rowsource="") right before your recreate its cursor, and link it back right before Requery.

That's a good point, Edward, could be the problem.

Also, I've seen this particular error occur once or twice when cursors are actually filtered tables, which of course NOFILTER will eliminate, that might be worth looking at...