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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.

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

  1. Open the Windows Control Panel (view by Small Icons).
  2. Open Set PG/PC Interface.
  3. Look for the Access Point named WINCC.
  4. 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 None or PC Internal can bypass the error temporarily to see if the project launches.

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.