Search your TecDoc installation directory for files named:
This error typically indicates that the TecDoc Catalog cannot access its database because another process has "exclusive" control over the files, or the configuration path is pointing to a locked or incorrect resource TecCom Wiki Quick Fix Checklist Close Duplicate Instances Search your TecDoc installation directory for files named:
You cannot simply "Disable" the antivirus; you must create an . Summary Checklist Kill background tasks in Task Manager
Temporarily disable your antivirus to test if the error persists. If the error disappears, add the TecDoc installation folder and the data directory to your antivirus Exclusion List . Summary Checklist Kill background tasks in Task Manager . Run the app as Administrator . Verify the Path in the configuration file. Ensure the folder isn't set to Read-Only . Check if another user on the network has the file open. Ensure the folder isn't set to Read-Only
This shows which process holds an exclusive handle. Kill that process (often a ghost TeCDocUpdateService.exe). Then rename tecdoc.conf to tecdoc.old and restore a known-good backup.