Error BC30560 no compiled code on invoke workflow file

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1

I’ve created a library to access Google Bigquery data. But when I try to access the Library activity I get this error: Invoke Workflow File: No compiled code to run
error BC30560: ‘ExtensionAttribute’ is ambiguous in the namespace ‘System.Runtime.CompilerServices’. At line -22
error BC30560: ‘ExtensionAttribute’ is ambiguous in the namespace ‘System.Runtime.CompilerServices’. At line -7
error BC30560: ‘ExtensionAttribute’ is ambiguous in the namespace ‘System.Runtime.CompilerServices’. At line 8

I’ve googled it at no success.

I’m working with the latest version of uipath studio 2019.4.4

Thanks!

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2

I’ve got this problem too - think it may be something to do with dependencies being at different versions across files but not sure. Did you resolve it?

3

Updates on this?

4

I know this is an old post, but I have the same problem with UiPath Studio 2020.10.2 and I found the reason of this behaviour. In my case the CsvHelper.2.14.0 package contains the class ExtensionAttribute, like mscorlib, and that caused this error. I replaced CsvHelper.2.14.0 with CsvHelper.2.16.3 and all works well now.

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