A Basic Application Could Not Be Started Wincc 7.5 Instant

Run the WinCC 7.5 diagnosis tool to identify any potential issues. The diagnosis tool can help identify problems with the configuration, system environment, or database.

WinCC 7.5 has a strict limit on path lengths (typically < 80 characters). Special characters or spaces in the project path can trigger this error.

First, take a deep breath. Your WinCC project is likely fine. This error typically occurs before WinCC even tries to load your graphics and tags. It is a Windows-OS level issue, specifically related to Data Execution Prevention (DEP) or Graphics Driver conflicts.

In simple terms, WinCC tried to start a core system process (the “basic application”), and Windows blocked it for security or compatibility reasons.

If none of the above solves the issue, consider:

Don’t let the vague wording of “A basic application could not be started” intimidate you. In 90% of cases, turning off DEP for those specific WinCC .exe files solves the issue instantly.

Quick Recap: Disable DEP -> Run as Admin -> Check SQL.

Have you solved this error another way? Let me know in the comments below.

Disclaimer: Always ensure you have a full project backup and a system restore point before modifying Windows security settings or uninstalling updates.

The error "A Basic Application Could Not Be Started" in WinCC 7.5 often stems from software incompatibilities, incorrect installation of SQL Server, or missing updates. Immediate Troubleshooting Steps

Run Reset_WinCC.vbs: Use this script in the WinCC "Bin" folder to terminate stuck processes and restart the system.

Verify SQL Server: Ensure the SQL Server (WINCC) service is running. An incorrectly named computer (containing special characters like underscores) can cause the SQL instance to fail during installation.

Check Operating System Compatibility: Use the Siemens Compatibility Tool to ensure your specific Windows build matches your WinCC version.

Example: WinCC 7.5 SP2 on Windows 10 Pro 22H2 often requires Update 15 or higher to function.

Update Microsoft Edge: An outdated Edge browser on Windows 10 (version 20H2) can disrupt the SQL Server installation used by WinCC.

Clean Temporary Files: Delete the CPL directory and .ENV file in your project folder if you recently switched Windows users. System Requirements & Configuration

User Rights: Ensure your Windows user is a member of the required Siemens user groups (e.g., SIMATIC HMI).

Avoid RDP/Antivirus during Install: Installing via Remote Desktop or with an active virus scanner can result in missing files. A Basic Application Could Not Be Started Wincc 7.5

Project Conversion: If you are opening an older project, you may need to use the Project Migrator.

WinCC 7.5 / "A basic application could not be started" message

The error message "A basic application could not be started" in WinCC V7.5 is

a common issue typically triggered by software incompatibilities, licensing errors, or a corrupted SQL Server instance Common Causes & Solutions Software Incompatibility

: Ensure your WinCC version is compatible with your Windows build. For example, WinCC 7.5 SP2 on Windows 10 22H2 often requires or higher to function correctly. Use the Siemens Compatibility Tool to verify your specific configuration. SQL Server Issues

: This error often stems from an improperly installed or corrupted Microsoft SQL Server instance. Special Characters : Ensure your computer or server name contains no special characters (like underscores ), as these can break the SQL installation. Browser Dependency : On some Windows 10 versions (like 20H2), an outdated Microsoft Edge

browser can disrupt SQL Server installation. Update Edge to the latest version and restart. Licensing Errors : Verify that you have a valid RC (Runtime + Configuration) RT (Runtime) license installed in the Automation License Manager User Rights & Groups : The logged-in user must be a member of the "SIMATIC HMI"

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 error "A Basic Application Could Not Be Started" in WinCC 7.5 typically indicates a conflict between the software and the Windows environment, often related to SQL Server instances, user permissions, or compatibility updates . Immediate Troubleshooting Steps

Run the WinCC Reset ToolClose all WinCC applications and run the Reset_WinCC.vbs script located in the WinCC installation directory (usually under Siemens/WinCC/bin). Restart your computer after it finishes .

Update Microsoft EdgeOddly, an outdated version of Microsoft Edge can disrupt the WinCC basic installation, particularly on Windows 10 (version 20H2). Ensure Edge is updated to v86.0.622.56 or higher by going to Help and feedback -> About Microsoft Edge .

Verify SQL Server InstanceThis error often triggers if the SQL instance "WinCC" is not running or was installed incorrectly . Open SQL Server Configuration Manager. Ensure the SQL Server (WINCC) service is Running.

Confirm your computer name does not contain special characters (like underscores), which can break SQL installations .

Install Necessary UpdatesCheck the Siemens Compatibility Tool to ensure your specific Windows build (e.g., 22H2) is supported. For WinCC 7.5 SP2 on newer Windows 10/11 builds, you may need to install Update 15 or higher . Advanced Fixes

Check Disk Compression: If "Compression to save disk space" is active on your C: drive, it can prevent SQL from starting. Deactivate compression for the WinCC project folder or the entire drive .

User Rights: Ensure you are logged in with the same Windows user account that was used to install WinCC .

Sector Size Check: For systems using NVMe drives, check if the physical sector size is greater than 4096 bytes. If so, a registry tweak for ForcedPhysicalSectorSizeInBytes may be required to allow SQL Server to function . Run the WinCC 7

If these steps fail, the most reliable (though time-consuming) solution found in community reports is a clean re-installation of the OS followed by a fresh installation of WinCC 7.5 and its latest service packs . To help you narrow this down, could you tell me:

What version of Windows (including build number) are you running? Did this start after a Windows Update?

Are you able to open any project, or does this happen only with a specific one? Possible causes for "Reset_WinCC.vbs" - SiePortal

Shut down winCC. 2). On the desk top there is an icon labelled something like "reset winCC". Siemens SiePortal

WinCC 7.5 / "A basic application could not be started" message

"A Basic Application Could Not Be Started" in WinCC 7.5 typically indicates a conflict between the software, the SQL Server instance, or underlying Windows security settings Immediate Troubleshooting Steps Run Reset_WinCC : Close all WinCC applications and run the Reset_WinCC.vbs

tool (typically found in the WinCC installation directory) to clear stuck processes, then restart your PC. Verify User Groups : Ensure your Windows user is a member of the local "SIMATIC HMI"

user group. You must have administrative rights to perform this. Check for Special Characters : Ensure your Computer Name does not contain underscores (

) or other special characters, as these can cause the internal SQL instance to fail. Update Microsoft Edge

: On Windows 10 (version 20H2 or later), an outdated Edge browser can interfere with the SQL Server installation used by WinCC. Update Edge via the "About Microsoft Edge" menu and reboot. Configuration & Compatibility SIMATIC Shell Simatic Shell

in Windows Explorer, right-click "Settings," and ensure the correct network adapter is selected. For WinCC 7.5+, verify that "Remote Communication" is enabled if working in a distributed system. Install Latest Updates

: Many users resolve this by installing the latest Service Packs (e.g., SP2) and subsequent Updates (e.g., Update 15 for SP2) to address compatibility with newer Windows 10/11 builds. Disable Security Conflicts : Temporarily disable Windows Defender

or third-party antivirus during a repair installation to ensure all components register correctly. Advanced Recovery

If the issue persists, the SQL Server instance may be corrupted. Reinstall SQL & WinCC : Uninstall WinCC and the SQL Server (WinCC)

instance separately. Clean the registry of leftover SQL entries before reinstalling WinCC. Sector Size Issue (Windows 11)

: If using Windows 11, verify that your drive's physical sector size is not greater than 4KB using fsutil fsinfo sectorinfo c: . If it is higher, you may need a registry fix for ForcedPhysicalSectorSizeInBytes to allow SQL Server to run.

Detailed requirements for distributed systems are available at Siemens Industry Online Support registry path for the Windows 11 sector size fix or help checking your compatibility Disclaimer: Always ensure you have a full project

WinCC 7.5 / "A basic application could not be started" message

The error "A basic application could not be started" in WinCC 7.5 usually indicates a conflict between the WinCC installation, the SQL Server instance, or the Windows operating system. Quick Fixes

Reset WinCC: Run the reset_wincc.vbs script (located in the WinCC installation folder) and restart your computer.

Update Edge: On Windows 10 (20H2 or later), an outdated Microsoft Edge browser can interfere with the SQL Server instance. Update Edge to the latest version.

Check Computer Name: Ensure your computer/server name does not contain special characters or underscores, as these can cause SQL installation failures. Key Troubleshooting Areas 1. SQL Server & Database Issues

Service Status: Verify that the SQL Server (WINCC) and SQL Server Agent (WINCC) services are running and set to "Automatic".

Reinstall SQL: If the error persists, uninstall WinCC and the SQL instance separately, then reinstall both from scratch.

Disk Sector Size: If using Windows 11 with modern NVMe drives, SQL Server may fail if the sector size is larger than 4KB. You may need to apply a registry fix to force the physical sector size. 2. Permissions & Groups

"A Basic Application Could Not Be Started" in SIMATIC WinCC 7.5

usually indicates a failure in the communication between the WinCC Explorer and its underlying SQL Server instance or a mismatch in software compatibility Immediate Troubleshooting Steps Run Reset_WinCC.vbs

: This is the first step recommended by Siemens experts to clear hung processes. Close all WinCC windows. reset_wincc.vbs

file in your WinCC installation directory or via the desktop shortcut if available. Run the script and restart your computer Verify Compatibility

: Ensure your version of Windows is compatible with WinCC 7.5. For example, WinCC 7.5 SP2 on Windows 10 22H2 often requires or higher to function correctly. You can use the Siemens Compatibility Tool to verify your specific setup. Root Causes & Solutions

WinCC 7.5 / "A basic application could not be started" message

Corrupted system files or missing registry entries can cause this error.

If the project was not closed properly (e.g., power loss, crash), the internal runtime database may be locked or corrupted.