Wow! That is strange!
If this problem happens all the time please follow the steps below.... it if doesn't happen all the time please recreate it before doing the following.
1. MOVE all the files from your PF3\Flight\FPP\ADJ folder then try PF3 again
If the problem still exists, continue below...
2. Rebuild the PF3 database, including running MakeRwy and ensure you are using the latest version, then try PF3 again.
If the problem still exists, continue below...
ZIP and attach...
3. All the files from your PF3\Flight\FPP folder
4. All the files from your PF3\Logs folder