Certification errors

Debug configuration test failed

The Windows App Certification Kit reports this under the debug configuration test. A debug build can also fail the supported API test.

What it means

Store apps must not be compiled for debug or reference debug versions of a framework, and the code must be built optimized. Microsoft notes that a debug build fails the supported API test too, even if it only calls allowed APIs.

How to fix it

  1. Switch the build configuration to Release and build the package again.
  2. Check that nothing in the package links to debug versions of a framework or runtime, like debug C++ runtime DLLs or a debug build of a library you ship.
  3. If the app has .NET components, make sure the right version of the .NET framework is installed on the build machine.
  4. Run the kit on the release package before you upload it.

Sending the fixed update with StoreFast

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Sources

Facts about Microsoft's tools were checked against these pages on October 16, 2026.