40+ years software experience but new to VisualGDB.  Just installed v6.1R3(build 5547) on VS2026.  I have .Net,  the Universal C Runtime installed and MSVC v143

I created a new project and went for the LED Blink example on STM32F091RC.

The project gives the following error:

The imported project “C:\Program Files\Microsoft Visual Studio\18\Professional\MSBuild\Microsoft\VC\v160\Microsoft.cpp.targets” was not found. Confirm that the expression in the Import declaration “$(_VCTargetsPathForToolset)\Microsoft.cpp.targets”, which evaluated to “C:\Program Files\Microsoft Visual Studio\18\Professional\MSBuild\Microsoft\VC\v160\\Microsoft.cpp.targets”, is correct, and that the file exists on disk.

..the file it wants is actually in the …VC\180 folder on this PC so it appears to be looking in the wrong place.

If I close and re-open the project, I get a dialog with ‘Missing MSBuild properties’, suggesting VisualGDB is an older version.  I have the latest installed (

When I press resolve I get the following exception:

Encountered 1 errors while trying to update project(s):
—————— System.ArgumentException ——————
System.ArgumentException: Invalid ruleset name: ConfigurationGeneral
at rj.SetCustomPropertyValue(String b, String a, String c)
at mf1.e(IVCConfiguration b, ToolchainKey a)
at rp.h(j43 c, IProjectEditContext d, Boolean b, KeilComponentTree a, String[] e)
at ss.t()
trace=[rj.SetCustomPropertyValue:41, mf1.e:0, rp.h:1353, ss.t:938]

Any ideas?

Thx, Jonny