A Basic Application Could Not Be Started Wincc 7.5 !!link!! Jun 2026
: An outdated version of Microsoft Edge has been known to disturb SQL and WinCC basic installations on Windows 10 (specifically version 20H2).
: Run the WinCC installer as an administrator and temporarily disable your antivirus software. Do not run other applications during the lengthy installation process.
: Re-verify SQL server logins and instance properties.
:
If you prefer not to duplicate the project, you can manually strip away temporary runtime files that might be locking the basic application initialization. Close WinCC and stop the runtime completely. Navigate to your WinCC project root directory.
What (including build number) are you running? Did this start after a Windows Update ?
Keep the path as short as possible (e.g., D:\WinCC_Projects\MyProject ). A Basic Application Could Not Be Started Wincc 7.5
:
Open the tool from the Siemens Start Menu folder. Select your problematic project's .mcp file as the source. Choose a brand-new destination folder on your local drive. Click Duplicate . Attempt to open the newly duplicated project. Step 4: Clear Temporary Lock Files Manually
If the error occurs only when opening a specific project, the project's temporary runtime files or database locks are likely corrupt. Close all Siemens software completely. : An outdated version of Microsoft Edge has
local user group. Ensure you have Administrator or Power User rights to manage project files. Troubleshooting Steps Possible causes for "Reset_WinCC.vbs" - SiePortal
The "Security Controller" tool aligns Windows security settings with Siemens requirements. Search for in your Start menu. Click Repeat Settings .
Ensure there are no spaces, dots, or special characters (like @, #, %) in the folder names. 3. Reset the WinCC Project : Re-verify SQL server logins and instance properties
Press Win + R , type lusrmgr.msc , and press to open Local Users and Groups. Click on Groups .
Troubleshooting "A Basic Application Could Not Be Started" in WinCC 7.5
