What are you using as the data source?

See if this message is describing a similar problem message #1361149

>I have a form where the user can print the invoices for a batch of client. Each invoice can be preceded by a cover letter written in Word by the user. The printout is done on a multiple bins printer.
>
>Here's the logic:
>- Create the cursor for the cover letters
>- Create the cursor for the invoices
>- Create the mail merge in Word:
> - Open an instance of Word
> - Open the letter
> - Set the data source
> - Start the mail merge
>- For each invoice:
> - Set the printer bin to the cover letter paper
> - Go to page n in Word
> - Select the page
> - Print the page
> - Set the printer bin to the invoice paper
> - Print the invoice
>
>The result is a printout where no assembly is necessary since the cover letter and the invoice for each client are printed togheter.
>
>This was working well for the past year or so, but now we are facing with a major problem. When printing more that 1,000 invoices, Word seem to choke and the process slow to a crawl until Word crash in the end with a "Not enough space" error message. In the task manager, I see the Word process taking around 25% of the CPU (still OK), but the memory consumption grow over 800MB before crashing. It take around 3 or 4 minutes to print a page.
>
>I've done tests with Vista and Word 2007 and with XP and Word 2003 and both give the same result.
>
>Here's the time it take to complete the process:
>- 100 invoices -> 0:02:14
>- 1,000 invoices -> 1:31:41 (should have taken around 20 minutes)
>- 2,000 invoices -> Word crash
>
>The solution I see would be to break down the merge process in batches of 100 records instead of a single batch, but it will require changes in the system that I would like to avoid.
>
>Anyone have an idea of why this process won't work anymore? Any testing I should do to locate and fix the problem?
>
>TIA