Hi.

The only time I've seen this happen with a query is when the table's index
was corrupted. However, Jet will apparently choke on a Yes/No field in a
GROUP BY query under special circumstances. (From your description, it
sounds like there's only one column in your query, an aggregate function on a
numerical data type, so this probably doesn't apply to you but it's something
for future reference.) For more information on this, please see the
following Web page:

http://groups.google.com/group/micro...39994fe0c3a15c

Have you tried a compact/repair recently? It's worth a try. If that
doesn't help, try importing the tables and this query into a new database,
remove the indexes, compact/repair, add the indexes again, and then run the
query to see if you receive the same error in the new database.

HTH.
Gunny

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"JMCS" wrote:

We have a query that has been working quite happily for over ayear, but has
suddenly decided to play up, giving a "No current record" message box. The
query is a Group By type, with just one of the items (hours) being "Sum". If
we remove the Group By, the query works fine.

We suspect a data problem, but cannot pinpoint it. Null is permitted in the
hours field, and has been there in the data in the past. Any clues, please?

JMCS