I don't think there is an issue with the number of records. When you get an error executing a query it is helpful to post the SQL so we can see it. You might want to try use "UNION ALL" rather than "UNION". I have hit limits on the number of UNIONs in the query.
Duane
MS Access MVP
Find out how to get great answers faq219-2884.
thanks for this post - I was running into limits using a Union qry in a db recently upgraded to SQL Server. Using UNION ALL solved my problem. Have a Star!!
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