Failed to load assembly: NPOI.OpenXml4Net.dll

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1

Hey, guys.

I’m getting this warning when opening an already existing UiPath project:

image

As you can see, the .dll file is located in the directory:

image
image999×231 14.2 KB

Could someone please explain to me why am I getting this warning and whether I can fix it?

Thanks!

2

Hello @franrua02!

It seems that you have trouble getting an answer to your question in the first 24 hours.
Let us give you a few hints and helpful links.

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3

I have the same issue

I upgraded my UiPath.System. Activities and suddenly I get this message

4

@loginerror @marian.platonov what can I do here?

5

What is your Studio and what is your UiPath.System.Activities version?

6

Studio: 2023.4.5
UiPath.System.Activities: same

And still I have most of my dependencies red and the following error

NU1102: Unable to find package UiPath.CodedWorkflows with version (>= 23.10.0)

  • Found 1 version(s) in C:\Program Files\UiPath\Studio\Packages [ Nearest version: 23.2.0-alpha.3503132 ]
7

I copied the code to a new project, I made sure that Studio and UiPath.System.Activities have the same version (2023.4.5) )and I still have these error:

Cannot load assembly: C:\Users\lu_rpa_acg.nuget\packages\npoi\2.2.1\lib/net40/NPOI.OpenXml4Net.dll : System.TypeLoadException: Inheritance security rules violated by type: ‘NPOI.OpenXml4Net.Util.ZipInputStreamZipEntrySource+FakeZipEntry’. Derived types must either match the security accessibility of the base type or be less accessible.
at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes)
at System.Reflection.RuntimeAssembly.GetExportedTypes()
at UiPath.Studio.Plugin.Workflow.Services.AssemblyContainerBase.AddAssemblyInternal(Assembly assembly, String path)
at UiPath.Studio.Plugin.Workflow.Services.AssemblyContainerBase.<>c__DisplayClass15_0.b__0(Tuple`2 range)

8

And finally now I managed to have only 1 error left, one related to http request activity.

How can I still check what was this activity like when it was still opening? I think the update to 23.4.5 made this http request activity to stop working, but I still need to be able to open it to see what is inside to be able to re-build it in 23.4.5

9

Try upgrading/downgrading the UiPath.WebAPI.Activities package and see if the activity is visible.

Also, you may try to open the xaml in Notepad++ to see its content.