Hello,

I've getting the above error message when attempting to remove and modify a scheduler registration.

I'm using version v10.2.0.229 of the DCC and 10.3.1.389 of the Web Admin console.

I get the following post in the event log:

13/06/2018 11:37:23 | Session: uze3yhkncuin5qlg0sydapbn
Server: hidden.hidden.com
Function: WebAdmin.QuickRetrieval.DistributedComputingClusterUtil.DeleteNode
User: TEST\hiddenURL: /WebAdmin/DccHandler

Message: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Exception: Removing the Scheduler node is not allowed.
   at WebAdmin.QuickRetrieval.DistributedComputingClusterUtil.SchedulerInvoke[T](String schedulerHost, Func`2 func)
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at WebAdmin.QuickRetrievalBase.<>c__DisplayClass48_0.<Process>b__0(ImpersonationContext ctx)
   at WebAdmin.WindowsAuthentication.RunUnderImpersonation(HttpContext context, Action`1 action, Boolean mustImpersonation)
   at WebAdmin.QuickRetrievalBase.Process(HttpContext context, Type serviceType, Object serviceInstance, MethodInfo method, Object[] parameters)
   at WebAdmin.QuickRetrievalBase.ProcessRequest(HttpContext context)

and

13/06/2018 11:37:24 | Session: pnqegtbxlofd4wvh3hrwwbz4
Server: hidden
Function: DeleteNode
User: hidden\hidden
URL: https://hidden.hidden.com/WebAdmin/dcc/nodes.aspx?server=hidden.hidden.com&lang=en-gb&ver=10.3.1.389

Message: Removing the Scheduler node is not allowed.

Admin operation failed.

Operation Description:
Remove node operation.
Given node address: hidden.hidden.com
Force removal?: False

Failure Information:
NodeBeingRemovedIsScheduler: Removing the Scheduler node is not allowed.

Operation ID: 80
Client Application: /LM/W3SVC/1/ROOT/WebAdmin-1-131733598433496680
Client Host: hidden.hidden.com


Start Time: 13/06/2018 11:37:24
Last Update: 13/06/2018 11:37:24

Removal was also unsuccessful using powershell with the force parameter:

Admin operation failed.

Operation Description:
Remove node operation.
Given node address: hidden.hidden.com
Force removal?: True

Failure Information:
NodeBeingRemovedIsScheduler: Removing the Scheduler node is not allowed.

Operation ID: 153
Client Application: PowerShell_ISE.exe
Client Host: hidden.hidden.com


Start Time: 04/06/2018 13:39:45
Last Update: 04/06/2018 13:39:45

-Ben