You are experiencing one or more of these symptoms.
DPC is running very slow
Your Bid shows values that do not seem correct (maybe your % Complete for the job changes every time you look at the Bids Tab or you are seeing LCCs you know you've completed changing % complete values.
You are unable to send or receive DPC Changes
Resolution
These symptoms are often indicative of a database in need of some housekeeping. Luckily, DPC includes a function called "Compact and Repair" that does this for you.
To run a Compact and Repair on your database:
Close DPC
Reopen DPC but do not activate any Bid (do not click on the Image, Budget, Timecard, Payroll Recap, or Notes Tabs)
Click File > Open - the Open Databases dialog box opens
Highlight your working database (it will have a checkmark in the box next to it - if there are multiple, repeat this process, one-at-a-time, for each open database)
Click the "Compact and Repair" button at the bottom of the dialog box - if this is the first time you've done this and your database has been in use for more than a few weeks, this might take several minutes to complete
Note
It's a good idea to run a Compact and Repair on your database at least once a week. This keeps your database in tip-top shape and helps prevent errors. See the User Guide for more information on database maintenance.