Simatic WinCC 7.5 is a robust SCADA system, but it is notorious for the frustrating "A basic application could not be started" error. This message usually appears during the startup phase or when attempting to open Graphics Designer. It indicates that a core background process—often related to the database or security settings—has failed to initialize.
: Temporary files or transaction logs ( .ldf ) are out of sync.
This error is frequently caused by operating system updates breaking unpatched Siemens software. For instance, running on a modern operating system like Windows 10 Pro 22H2 requires specific patches to function. a basic application could not be started wincc 75 best
Always run the WinCC installer “as administrator.” If your PC is part of a domain, consider temporarily removing it from the domain, installing WinCC, and then rejoining the domain after successful installation.
| If none of the above works | Action | |----------------------------|--------| | | Run WinCC setup → Select Repair . | | Uninstall/Reinstall WinCC | Use Siemens’ Total Uninstall tool first. | | Restore VM snapshot | If running on a virtual machine (VMware/Hyper-V). | | Contact Siemens Support | Provide error log from C:\ProgramData\Siemens\WinCC\Diagnostics . Simatic WinCC 7
If the error occurs only with one specific project, the project database files may be locked or corrupted. Close all Siemens software.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. : Temporary files or transaction logs (
Go to the project’s Archive folder and safely delete the temporary .ldf transaction logs if they are separate from the main .mdf database. Best Practices to Prevent Future WinCC Crashes
Delete temporary runtime files:
If repair fails, a clean reinstallation is often the most reliable solution. Many users have reported that after exhausting all other options, this was the definitive fix.