# Error Cannot create unkown type

**URL:** <https://forum.uipath.com/t/error-cannot-create-unkown-type/233699>\
**Category:** Orchestrator\
**Tags:** orchestrator, uiautomation, activities\
**Created:** [June 25, 2020, 8:23am UTC](https://forum.uipath.com/t/error-cannot-create-unkown-type/233699 "2020-06-25T08:23:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KDJ](https://avatars.discourse-cdn.com/v4/letter/k/7bcc69/32.png) [@KDJ](https://forum.uipath.com/u/KDJ)\
**Post date:** [June 25, 2020, 8:23am UTC](https://forum.uipath.com/t/error-cannot-create-unkown-type/233699/1 "2020-06-25T08:23:15Z")

</div>

Hey Everyone

I tried to put my workflow on the orchestrator to get it in Production. But when I tried launching it I got this error message:  
An error appeared while executing VOB-INT-ink-tw-DISPATCHER\_VOB-INT=Inkomstenskaarten  
Error message: Cannot create unknown type ‘{[http://schemas.microsoft.com/netfx/2009/xaml/activities](http://schemas.microsoft.com/netfx/2009/xaml/activities)}InArgument({[http://schemas.uipath.com/workflow/activities](http://schemas.uipath.com/workflow/activities)}Browser)’.  
RemoteException wrapping System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{[http://schemas.microsoft.com/netfx/2009/xaml/activities](http://schemas.microsoft.com/netfx/2009/xaml/activities)}InArgument({[http://schemas.uipath.com/workflow/activities](http://schemas.uipath.com/workflow/activities)}Browser)’.  
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.FuncFactory`1.Evaluate() at System.Activities.DynamicActivity.OnInternalCacheMetadata(Boolean createEmptyBindings) at System.Activities.Activity.InternalCacheMetadata(Boolean createEmptyBindings, IList`1& validationErrors)  
at System.Activities.ActivityUtilities.ProcessActivity(ChildActivity childActivity, ChildActivity& nextActivity, Stack`1& activitiesRemaining, ActivityCallStack parentChain, IList`1& validationErrors, ProcessActivityTreeOptions options, ProcessActivityCallback callback)  
at System.Activities.ActivityUtilities.ProcessActivityTreeCore(ChildActivity currentActivity, ActivityCallStack parentChain, ProcessActivityTreeOptions options, ProcessActivityCallback callback, IList`1& validationErrors) at System.Activities.ActivityUtilities.CacheRootMetadata(Activity activity, LocationReferenceEnvironment hostEnvironment, ProcessActivityTreeOptions options, ProcessActivityCallback callback, IList`1& 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.d\_\_83.MoveNext()

As I am not really an IT expert, I have no clue what to do here… I imagine it has something to do with the dependencies and the fact the the workflow was made on a newer version of the studio as the one in the production environment?  
Studio dev. 2020.4.1-btea2.2  
robot prod: 19.10.4.0

Kind regards