In short: This is an within the SIMATIC S7 environment, version 5.5, service pack 13, update 1.
| Error Message | Likely Cause | Solution | |---------------|--------------|----------| | | Base SP13 not installed or architecture mismatch (32-bit vs 64-bit) | Verify installed programs: Look for "S7 F Configuration Pack V5.5 SP13". Reinstall base SP13. | | "Error 1920: Service ALM failed to start" | Windows permission or dependency issue | Open Services.msc, start "Automation License Manager" manually. Set it to Automatic. | | "F-library version mismatch after install" | Residual cache from previous installation | Delete %LOCALAPPDATA%\Siemens\Automation\Cache\ and restart TIA Portal. | simatic-s7fprojx-v5-5-sp13-upd1.exe