Problem:
I have been using Promodag Reports for months without any problem and I now obtain various 'Invalid argument' error messages when attempting to import data, or run reports. What is happening?

Explanation:
You are using an Access database, and Microsoft set the size limitation of *.mdb files to 2 GB. Please make sure that you are not about to reach that physical limit; in that case, the database may be trying to expand beyond 2 GB due to temporary tables created by Promodag Reports while it generates reports.

See also: http://support.microsoft.com/kb/835416

Solution:
Please attempt to delete a few data imports as follows:

• Go to File > Import Message Tracking Data, select your Exchange server in the right pane, then click the Server Properties button.
• A new window opens. In the Message Tracking tab, select the most recent tracking file in the list.
• Click the Delete button.
• If it works, delete the next one...
• Once you have cleared 5 or 6 of those data imports, go to File > Database Properties and try to compact the database.

Should you need to purge more records, use the Tools > Purge Message Tracking Data option as it is explained in this article: How to manually purge data from your database.

See also: Access database: What can I do if the size of my database reaches 1.9 to 2 GB?.