Andrew,
I'm sorry but I must have left something important out of my post. The line - 'Set order to tag recnums' causes an error on at least 2 machines. The tag recnums is the 6th tag in the cdx file. If I type 'Set order to tag 6' no error occurs. How can this be?
PS- Thanks for taking the time to research this question. Sorry, I did not make myself clear.
A problem is a problem only as long as it has a possible solution. Lacking that, it becomes a FACT!