After many tests, the only way to fix this error is to use the exact path from your File Explorer's address bar for both DATA and MEDIA entries, and to remove any hidden or invisible characters that might be causing the problem.
When TecDoc launches, it reads a local configuration file to locate its core databases, license files, and media directories. This error typically happens due to: after moving data folders. loading data failed check the configuration file tecdoc
Look inside the TecDoc directory for files named TECDOC_CD.BAK or TecDoc.config.old . Rename your corrupted configuration file to TecDoc_old.txt . After many tests, the only way to fix