Could not load file or assembly ClosedXML - KB

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Could not load file or assembly ClosedXML

Approach 1
Excel Activities ClosedXML is one of the dependencies required to operate and this issue generally occurs if the ClosedXML package was corrupted/missed.

  • Please navigate to the package managers window (Ctrl + P).
  • Navigate to the All Packages .
  • Search for excel activities.
  • Check the version of ClosedXML package in dependencies as shown below:

a.png
  • Navigate to the location " %Userprofile% /.nuget/packages"
  • "ClosedXML" folder is present then delete it

b.png
  • Install the ClosedXML package version mentioned in above screenshot from manage packages:

c.png

Approach 2
Please follow the below steps & let me know if this helps.
  • Open %userprofile% in your affected Robot system
  • Navigate to “.nuget” folder.
  • Take a backup of the “packages” folder to a different location.
  • Delete the current folder in .nuget location.
Reason: This would delete all the packages thus allowing to Robot to download the packages again when a process is executed.
  • Now launch Studio & execute the process. This should complete the auto installation of dependent package
Reason: The process will download again with all the required dependencies.

Preferred approach is 1 as with approach 2, robot has to download all the dependencies for all packages/processes and first execution of almost all processes may take some time.