# Error when creating new Virtual Controller

**URL:** <https://tech-community.robotics.abb.com/t/error-when-creating-new-virtual-controller/11616>\
**Category:** RobotStudio\
**Tags:** robotstudio, virtual-controller\
**Created:** [September 19, 2024, 12:07pm UTC](https://tech-community.robotics.abb.com/t/error-when-creating-new-virtual-controller/11616 "2024-09-19T12:07:26Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![wals](https://avatars.discourse-cdn.com/v4/letter/w/8dc957/32.png) [@wals](https://tech-community.robotics.abb.com/u/wals)\
**Post date:** [September 19, 2024, 12:07pm UTC](https://tech-community.robotics.abb.com/t/error-when-creating-new-virtual-controller/11616/1 "2024-09-19T12:07:26Z")

</div>

Hi,

When I open a new Virtual Controller in RobotStudio I get this error:

“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”"

# RobotStudio .NET exception: FFFFFFFF : Unknown error An error occurred while sending the request. 0

Base exception: RobApiException  
FFFFFFFF : Unknown error  
An error occurred while sending the request.  
0  
at RobotStudio.Services.RobApi.RwsHelper.ThrowOnError(IRwsError responseError, String relativeUrl, String payload, RobHResult ignoreErrors)  
at RobotStudio.Services.RobApi.RwsClientExtensions.d\_\_8.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.RobApi.RWS.RobControllerConnectionRWS.d\_\_101.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.RobApi.RWS.RobControllerConnectionRWS.d\_\_102.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.RobApi.RobApi1.RobControllerConnectionRobApi1.d\_\_104.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.Controller.ControllerService.d\_\_35.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.Controller.ControllerService.d\_\_34.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.Controller.ControllerService.d\_\_32.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at RobotStudio.Services.Controller.ControllerService.d\_\_31.MoveNext()  
— End of stack trace from previous location where exception was thrown —  
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()  
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)  
at ABBInternal.Controller.StationVirtualControllerManager.d\_\_22.MoveNext()  
URL:/users/impersonate  
Payload:uid=524296  
“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”“”"

Does anyone know what the problem is?

---

<div class="post-metadata">

**Author:** ![wals](https://avatars.discourse-cdn.com/v4/letter/w/8dc957/32.png) [@wals](https://tech-community.robotics.abb.com/u/wals)\
**Post date:** [September 19, 2024, 12:29pm UTC](https://tech-community.robotics.abb.com/t/error-when-creating-new-virtual-controller/11616/2 "2024-09-19T12:29:45Z")

</div>

I fixed it by changing the appweb.conf file from:

* * *

Listen -1  
#ListenSecure -1

## #SSLCertificateFile “./self.crt” #SSLCertificateKeyFile “./self.key”

to

* * *

# Listen -1

ListenSecure -1

## SSLCertificateFile “./self.crt” SSLCertificateKeyFile “./self.key”