Error opening a Workflow

Help
1

HI all!

I am trying to open a big Workflow and I’m getting the following error:

(My UiPath version is 2016.2.6192)

Cannot create unknown type ‘{http://schemas.microsoft.com/netfx/2009/xaml/activities}Variable({clr-namespace:UiPath.Library;assembly=UiPath.Library}UiElement)’.

System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{http://schemas.microsoft.com/netfx/2009/xaml/activities}Variable({clr-namespace:UiPath.Library;assembly=UiPath.Library}UiElement)’.
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.Xaml.XamlServices.Load(XamlReader xamlReader)
at System.Activities.XamlIntegration.ActivityXamlServices.Load(XamlReader xamlReader, ActivityXamlServicesSettings settings)
at System.Activities.XamlIntegration.ActivityXamlServices.Load(XamlReader xamlReader)
at UiPath.Workflow.Designer.DesignerAddIn.LoadActivity(String file)
at UiPath.Workflow.Designer.DesignerAddIn.Load(String file)
at UiPath.Workflow.ViewModels.WorkflowViewModel…ctor(String workflowFile, IXamlLoadErrorService errorService, Boolean recovered)
at UiPath.Workflow.ViewModels.MainViewModel.OpenWorkflowInProject(String workflowPath, Boolean recovered)

Am I missing a package? What package is it?

2

This error was due to “UIPath.V7 Compatibility Pack” package that was not installed.

I think this error message could warn us about version compatibility issues.

2 Likes
3

@Thiago

so it has been resolved.

Regards…!!

4

I am geting the error

Main has thrown an exception

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

Source: System.Xaml

Exception Type: XamlObjectWriterException

System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}ReadPDFText’.
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__DisplayClass49_0.b__0()

5

Hello

When you start demo project of URL in my environment,
An error similar to the error described by @B_R_Pawan_Kumar occurs.

It is the environment currently running UiPathStudio.

Version: UiPath Studio Community 2016.2.6344
Os: Microsoft Windows 10 Pro 64-bit

Does anyone know how to solve it?

6

Hi !
Same issue here. We have this error using the robot. We didn’t have this error on studio. Very strange and no clue in logs.

Kind regards,
fahuet

7

Hi, I am using UiPath community Edition. Recently it has been updated to 2018.2.0 and after when I am trying to schedule through task scheduler it fails. Below is the error. Can anyone plz help at earliest. I have tried installing v7 and Framework package too but it doesn’t work.

System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}WriteRange’. 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__DisplayClass54_0.b__0(), HResult -2146233088

Regards,
Aashish

8

I am getting the below error with v18.2.0 I have also updated all the packages-

System.Xaml.XamlObjectWriterException: Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}ExcelApplicationScope’.
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__DisplayClass54_0.b__0(), HResult -2146233088.

Please help asap.

Regards,
Aashish