I have an activity in my workflow that reads a workbook (excel file) without needing to have excel installed on the laptop the robot is running on. However since the latest update i now get this error [image] Any idea what is causing this?

You need the add the excel package in Manage Package :slightly_smiling_face:

On the laptop running the robot all the packages in the packages file are the exact same as those on the laptop it was developed on.

If you don’t have excel in your system, please use Workbook Read range instead of Excel Read Range.

That’s the activity i am using

Please check the below thread. [image] Message: Cannot create unknown type Help Good day I am getting the following error when I try to run my workflow Message: Cannot create unknown type ‘{ http://schemas.microsoft.com/netfx/2009/xaml/activities }Variable({ http://schemas…

Already done all that. Activities folder on the laptop running the robot matches the activities folder on the dev laptop.

Try this. Goto Manage package, select excel package, select previous version and install

Sorry. that hasn’t fixed it. Has UI path maybe made it impossible to read spreadsheets without excel with the latest update? It’s just that this robot has been running with no issues for weeks now but i made a change unrelated to the read range activity just after the update and now this is happenin…

Hi @lucas.mcgonagle Could you isolate the issue with a blank project with only the faulty activity? It would help to debug the issue :slight_smile:

Replaced the system>file>workbook>Read range with an application scope read range. Still saying the same thing but for excel application scope

Execution error : System.Xaml.XamlObjectWriterException: Cannot create unknown type '{http://schemas.uipath.com/workflow/activities}ReadRange

Help

Vivek_Arunagiri (Vivek Arunagiri) October 15, 2018, 1:39pm 6

Please check the below thread.

Topic		Replies	Views
Message: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}ReadRange’ Help	4	4081	January 18, 2022
System error at initialization Excel package Help excel , orchestrator , question	2	756	January 18, 2021
Execution error : System.Xaml.XamlObjectWriterException Help	7	11243	April 1, 2019
Orchestrator Error Deployment Help orchestrator	3	1759	February 13, 2019
Error opening a Workflow Help	7	6631	June 5, 2018

Execution error : System.Xaml.XamlObjectWriterException: Cannot create unknown type '{http://schemas.uipath.com/workflow/activities}ReadRange

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