Cannot create unknown type '{http://schemas.uipath.com/workflow/activities}Continue'

activities
studio

#1

Hi,
I’m getting issue regarding “XamlObjectWriterException”, when run the script.
error message:-
"get_unread_mails has thrown an exception

Source: System.Xaml

Message: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}Continue’.

Exception Type: XamlObjectWriterException

System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}Continue’.
at System.Xaml.XamlObjectWriter.WriteStartObject(XamlType xamlType)
at System.Xaml.XamlWriter.WriteNode(XamlReader reader)
at System.Xaml.XamlServices.Transform(XamlReader xamlReader, XamlWriter xamlWriter, Boolean closeWriter)
at System.Activities.XamlIntegration.FuncFactory1.Evaluate() at System.Activities.DynamicActivity.OnInternalCacheMetadata(Boolean createEmptyBindings) at System.Activities.Activity.InternalCacheMetadata(Boolean createEmptyBindings, IList1& validationErrors)
at System.Activities.ActivityUtilities.ProcessActivity(ChildActivity childActivity, ChildActivity& nextActivity, Stack1& activitiesRemaining, ActivityCallStack parentChain, IList1& validationErrors, ProcessActivityTreeOptions options, ProcessActivityCallback callback)
at System.Activities.ActivityUtilities.ProcessActivityTreeCore(ChildActivity currentActivity, ActivityCallStack parentChain, ProcessActivityTreeOptions options, ProcessActivityCallback callback, IList1& validationErrors) at System.Activities.ActivityUtilities.CacheRootMetadata(Activity activity, LocationReferenceEnvironment hostEnvironment, ProcessActivityTreeOptions options, ProcessActivityCallback callback, IList1& validationErrors)
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.Executor.RobotRunner.<>c__DisplayClass51_0.b__0()"

Is there any solution for same?


#2

Are you trying to run the process created in a different instance into your current system?

Make sure you have all the required activities installed. Looks like ‘Continue’ activity is missing in you current instance of UiPath studio.

Check this:

Thanks,
Rammohan B.


#3

Thanks for replying @Rammohan91,

Continue activity is already installed in uipath activity “Activity>Workflow>control flow>Continue”.

Is there any other possible solution for same issue?


#4

Hello @sams,

Could you please reinstall core package?
OR
attach your workflow

Cheers,
Pankaj


#5

If you run robot.exe -file option in the script, publish at Studio before running.


#6

Thank you! This solved the issue that I had.