A Basic Application Could Not Be Started Wincc 75 Best May 2026

Title: Troubleshooting "A Basic Application Could Not Be Started" Error in WinCC 7.5: A Comprehensive Guide

• C:\Program Files (x86)\Siemens\WinCC\
• C:\ProgramData\Siemens\WinCC\
• Project paths (D:\WinCC_Projects\YourProject)

For further assistance, you can browse discussions on the Siemens SiePortal Forum or Reddit's PLC community.  a basic application could not be started wincc 75 best

1. Temporarily disable the Firewall and Antivirus.
2. Try to start the project.
3. Note: If this works, do not leave the firewall off permanently. Instead, create Inbound/Outbound rules allowing C:\Program Files (x86)\Siemens\WinCC\ executables.

Solution 4: Reinstall or Update WinCC

1. Reinstall WinCC: If none of the above steps resolve the issue, try reinstalling WinCC: