Many TecDoc repacks bundle a portable database server (like PostgreSQL or Transbase). If this service is dead, the configuration file cannot pull data. Press Windows Key + R , type services.msc , and press .
Look for folders named cache , temp , index . Delete their contents (not the folders themselves) and restart the software. Many TecDoc repacks bundle a portable database server
sqlite3 tecdoc.db "PRAGMA integrity_check;" Many TecDoc repacks bundle a portable database server