Try selecting Options from the Tools menu and then go to the General tab and
check the box against "Confirm conversions at open". Then when you try to
attach the datasource, select the DDE option.

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Please respond to the Newsgroup for the benefit of others who may be
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Hope this helps,
Doug Robbins - Word MVP
>I am trying to help a prosecutors office with a problem merging documents
> that worked prior to installation of Office 2003 and Windows XP. This is
[quoted text clipped - 30 lines]
> Thanks,
> Justice
ITJRW - 16 Jan 2005 06:16 GMT
Doug,
I tried what you suggested but got error re: DDE. I had alread checked the
"Confirm conversions at open" relative to the Access 2 converter download.
I found that the Access 2 legacy program is creating a valid .dat file for
the master document requested with the same name as the master document but
in short filename form (remember it is very old). I opened the related Word
master mail merge document and added the .dat file as the data source and
merged without error.
I appears that the process is indeed attempting DDE with short file names
and is unable to identify the file name properly. I don't know whether the
"Not valid filename Merge error (#1056) is from the Main merge document or
the created .dat file of the similar name.
Any other suggestions?
ITJRW
> Try selecting Options from the Tools menu and then go to the General tab
> and check the box against "Confirm conversions at open". Then when you
[quoted text clipped - 34 lines]
>> Thanks,
>> Justice