A Basic Application Could Not Be Started Wincc 7.5 Upd May 2026
Troubleshooting Guide: “A Basic Application Could Not Be Started” in Siemens WinCC 7.5
Step 3: Check the Project Path
WinCC 7.5 is notorious for path sensitivity.
- Do not use:
C:\Users\YourName\Desktop\WinCC Projects\New Project - Do use:
C:\WinCC_Prj\MyProject
Action: Move your project to a root directory with a short, alphanumeric-only path. Then, use WinCC Explorer → File → Open to browse to the new location. A Basic Application Could Not Be Started Wincc 7.5
Step 1: Check the System Requirements
Ensure that the system meets the minimum requirements for running WinCC 7.5. Check the system's processor, memory, and disk space to ensure they meet the recommended specifications. Troubleshooting Guide: “A Basic Application Could Not Be
Method 5: The "Set PG/PC Interface" Conflict
A mismatch between the application access point and the network card causes runtime failures. Action: Move your project to a root directory
- Open the Windows Control Panel (view by Small Icons).
- Open Set PG/PC Interface.
- Look for the Access Point named
WINCC. - Ensure it is assigned to the correct interface (e.g.,
TCP/IP -> [Your Network Card]).- Tip: If you are just testing on the local computer without a PLC, sometimes setting this to
NoneorPC Internalcan bypass the error temporarily to see if the project launches.
- Tip: If you are just testing on the local computer without a PLC, sometimes setting this to
6. Corrupted Project Cache (LZH files)
WinCC compresses its project data. Corruption in the project’s archive can prevent the basic application loader from unpacking necessary files.
1. Disable DEP for WinCC (The Golden Fix)
Data Execution Prevention (DEP) is a Microsoft security feature that sometimes flags older WinCC processes as threats.
- How to fix it:
- Navigate to Control Panel > System > Advanced System Settings.
- Under the Advanced tab, click Settings under Performance.
- Go to the Data Execution Prevention tab.
- Select “Turn on DEP for all programs and services except those I select.”
- Click Add and browse to your WinCC installation folder (usually
C:\Program Files (x86)\Siemens\WinCC\bin). - Add the following executables (even if you don't see them all, add what exists):
CCDlgServer.exeCCCMStart.exeRTSrv.exeWinCC_Explorer.exe
- Click Apply, OK, and Restart your computer.
