Try catch block throwing validation error

[ram69 (Ram)]

Hi everyone
The workflow when i am executing in my dev system it’s working fine where uipath studio is installed, when the same code is moved to production system where uipath studio is not there only uirobot is configured
i am getting the following error
Execution error : System.Exception: The invoked workflow ‘clicking_more_options’ has validation errors. Please review the workflow and resolve the errors. —> System.Activities.InvalidWorkflowException: The following errors were encountered while processing the workflow tree:

‘clicking_more_options’: The private implementation of activity ‘1: clicking_more_options’ has the following validation error: Compiler error(s) encountered processing expression “exception.ToString”.

Type ‘SelectorNotFoundException’ is not defined.

at System.Activities.Hosting.WorkflowInstance.ValidateWorkflow(WorkflowInstanceExtensionManager extensionManager)

at System.Activities.Hosting.WorkflowInstance.RegisterExtensionManager(WorkflowInstanceExtensionManager extensionManager)

at System.Activities.WorkflowApplication.EnsureInitialized()

at System.Activities.WorkflowApplication.Enqueue(InstanceOperation operation, Boolean push)

at System.Activities.WorkflowApplication.SimpleOperationAsyncResult.Run(TimeSpan timeout)

at System.Activities.WorkflowApplication.BeginRun(AsyncCallback callback, Object state)

at UiPath.Core.Activities.InvokeWorkflowFile.<>c__DisplayClass21_0.b__4()

— End of inner exception stack trace —

at UiPath.Core.Activities.InvokeWorkflowFile.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)

at System.Activities.AsyncCodeActivity.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)

at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)

Thank you
Ram kumar

[vinay_reddy]

Please refer to the below post

Project cannot be published. Main file has validation errors

Well when you are publishing a project so is there any other files also exists in that project? Suppose you have created a project name “Abc” and inside that created workflow1, workflow2 and so". and if there is some eror in workflow1 and you are wants to publish and working on workflow 2 then it will not allow you to publish. it will publish project having all workflows inside it as with that package name. so make sure you are following such thing .

[ram69 (Ram)]

in catch block after changing the exception from SelectorNotFoundException to system.exception, the issue is fixed.