First thing would be to make sure the Name AutoCorrect boxes are unchecked
under:
Tools | Options | General | Name AutoCorrect
Then compact the database to get rid of this junk:
Tools | Database Utilities | Compact/Repair
Explanation of why:
http://allenbrowne.com/bug-03.html
If the report is based on a crosstab query, you could solve the issue by
specifying all the possible values in the Column Headings property of the
query. That way, Access does not have to run the query to completion before
it can determine the fields for the report.
Other general suggestions for performance issues in Access:
http://www.granite.ab.ca/access/performancefaq.htm

Signature
Allen Browne - Microsoft MVP. Perth, Western Australia
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.
>I have an Access report that was created some time ago, which is based on a
> query. Immediately after I change any control in the report, the report
[quoted text clipped - 5 lines]
>
> Any help please? thanks
faberk - 15 Nov 2006 19:35 GMT
Thank you Allen...
The crosstab query appears to have been rather complex. Defining the column
headings solved my problem.
> First thing would be to make sure the Name AutoCorrect boxes are unchecked
> under:
[quoted text clipped - 21 lines]
> >
> > Any help please? thanks