Runtime execution error

Installer(.exe or .msi):

License type(Free, Trial/License code):

Studio/Robot version:

Current behavior:


An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.Exception: Cannot set unknown member ‘{}VirtualizedContainerService.HintSize’.


Uipath is missing some package.

  • Open output panel to see what package is missing

  • Add the missing package on Manage package button.:grinning:

Thank Man.

Your welcome. If it is the rite solution, please mark it as solved :grinning:


I have checked all the packages, also re-installed the UiPath with latest version of .net framework,

Cant able to debug simple workflow only.


any suggestions?

I had an old project built using REFramework which encountered the same issue recently. For me, what worked is I had to get a fresh Main.xaml and it.
You can get a fresh one either by:

a. Copying from a working/recent project
b. Creating a fresh project and copying the fresh Main.xaml

Then, you have to rebuild your Main.xaml workflow for your project.

Or if you want an easier approach, use a file differentiating tool (e.g. Beyond Compare) then compare a fresh Main.xaml with your flawed one and adjust the necessary lines.

Hope this helps.