Windows User Account Control (UAC) sometimes blocks software from accessing protected configuration folders like Program Files or ProgramData . Right-click the on your desktop. Select Properties . Go to the Compatibility tab. Check the box for Run this program as an administrator . Click Apply , then OK , and relaunch the software. 2. Verify and Edit the Configuration Files

: Sometimes the registry key pointing to the data folder is corrupted. Check HKEY_LOCAL_MACHINE\SOFTWARE\TecDoc for valid path entries. tecdoc.com.pl

By addressing the configuration file and validating the file path to the database, you can resolve the "Loading data failed" error and restore the functionality of your TecDoc system.