I recently migrated my Uipath workflow from windows (Legacy) to VB. Windows type. I’m unable to run my process flow due to the above error. This has not been a issue previously. Between I’m newbie here. Appreciate, if anyone could assist me to resolve this issue please. Thanks in advance! [image]

Expression Activity type 'VisualBasicValue`1' requires compilation in order to run. Please ensure that the workflow has been compiled

postwick (Paul Ostwick) December 2, 2022, 3:41pm 6

Tons of threads on this. Search the forum. It’s the double quotes.

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Facing "Expression activity type 'VisualBasicValue1' requires compilation in order to run" Studio uiautomation , studio , question , library , output_panel	14	63	April 7, 2025
Uipath Expression Activity type 'VisualBasicValue`1' requires compilation in order to run. Please ensure that the workflow has been compiled Studio orchestrator , activities , studio , question	4	1414	November 22, 2023
Compilation Error in Process but not in Library: "Expression Activity type 'VisualBasicValue`1' requires compilation in order to run. Please ensure that the workflow has been compiled." Studio studio , question , output_panel , windows , uipath-conversion-tool , windows-legacy	11	2881	January 26, 2023
Some activities are giving an Error: ''VisualBasicValue`1' requires compilation in order to run", after converting Windows-legacy project to the Windows compatibility Activities activities , question , system	5	1842	November 3, 2022
What this error means : Expression Activity type 'VisualBasicValue`1' requires compilation in order to run. Please ensure that the workflow has been compiled Studio studio , question , output_panel	3	709	March 20, 2023