>>With the LOCATE command capable of full Rushmore optimization these days, I rarely use seek anymore. In any event, I figured it out, I believe. See my reply to myself. I don't fully understand what was causing the problem, but I got rid of the problem.
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>I rather use seek() or indexseek() for then you can identify a different alias, as, unfortunately, LOCATE lacks the IN clause

True as well. If there is a possibility of using seek or indexseek I would always use this instead of LOCATE.