Invalid File Reference after importing data to database

[malcek]

Recently I have system crash and have to setup Sugar again. Backup was two days old, so no modification or new data was made. After importing I have a problem downloading documents. All the file seems to lost reference.
keep getting warning: Invalid File Reference

How to fix that. I'm desperate, because I got stored about 2k documents in it

Martin

Solved: After I check backup zip I see that not all the files were copied. It is very difficult to find out if something is missin in 2k files. Why i don't know, but after adding missing files all the files are downloadable.

[sts]

Uploaded files are stored in cache/upload directory (per default, it can be changed in config.php, parameter 'upload_dir'). Their name is identical to the document-id (field 'id' in table 'documents'). This is the only file reference used with Sugar. The original file name is stored in the 'documents' table only.