A Basic Application Could Not Be Started Wincc 7.5 File

Troubleshooting Guide: “A Basic Application Could Not Be Started” in Siemens WinCC 7.5

1. Corrupted User Account Control (UAC) or Permissions

WinCC 7.5 is highly sensitive to Windows user permissions. Running without Administrator rights is the number one cause.

1. Run WinCC as Administrator

Even if your account is an administrator, Windows UAC can block certain automation components. A Basic Application Could Not Be Started Wincc 7.5

• Right-click WinCC Explorer or TIA Portal.
• Select Run as administrator.
• Reopen your project and try starting the application again.

Tip: To make this permanent, go to Properties → Compatibility → Check "Run this program as an administrator". Troubleshooting Guide: “A Basic Application Could Not Be

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

If you work with Siemens WinCC (TIA Portal) version 7.5, you may have encountered a frustrating error message when trying to open a project or start the runtime environment: Right-click WinCC Explorer or TIA Portal

"A basic application could not be started."

This error typically appears without a detailed explanation, leaving many users stuck at a loading screen or facing an immediate crash of the WinCC Explorer or Graphics Designer. Below, I’ll walk you through what causes this issue and how to fix it step by step.

5. Clean the Project Cache (Last Resort)

If the above fails, the error might live in your project’s local configuration files.

• How to fix it:
  • Close WinCC Explorer.
  • Navigate to your project folder (e.g., D:\WinCC_Projects\MyPlant).
  • Delete the folder named ProjectName_00 (or ProjectName_01). Note: This is the compile cache, not your actual tags/screens.
  • Reopen the project. WinCC will rebuild the cache automatically.