When good files go bad, sometimes a quick taming is all that's needed to get operations up and running. Performing "file maintenance" or as I like to call it "Compactimize" sets the bits and bytes back to their place in the database. Although relatively straight forward, there are pitfalls to be wary of throughout even this process. And though I call it the "basic" recovery process, there's quite a bit going on to restore your FileMaker files to a working state. Compactimize is derived from the two main steps in FileMaker file recovery, referring to the actions you will need to perform; compact and optimize.

Follow the steps starting with 1-9 for basic file maintenance. More often than not, this will be sufficient for the time being. If you have the time I always suggest following up with the advanced recovery steps.