Error “Unable to find a Delivery Controller” when you launch Citrix Studio

Under rare conditions, when you launch Citrix Studio you might get the error ‘Unable to find a Delivery Controller‘ as shown in the screenshot below:

User-added image

Additionally, following event is recorded in Windows Application log:

Source: Citrix Configuration Service
Event ID: 1007
Description: Otherwise unhandled exception in WCF call : System.ServiceModel.CommunicationException: Internal Error —> System.NullReferenceException: Object reference not set to an instance of an object.

at Citrix.Fma.Sdk.InterServiceManager.WcfClientBase`1.SelectNewConnection()

at Citrix.Fma.Sdk.InterServiceManager.WcfClientBase`1.RegisteredCallAndRetry[TResult](Func`2 operation)

— End of inner exception stack trace —

at Citrix.Fma.Sdk.InterServiceManager.WcfClientBase`1.RegisteredCallAndRetry[TResult](Func`2 operation)

at Citrix.InterService.DelegatedAdminApi.DelegatedAdminApiClient.CheckGlobalAccess(Boolean& accessGranted, String[] sids, String serviceType, String operation)

at Citrix.Fma.Sdk.ServiceCore.DelegatedAdminProvider.DemandPermission(String operation)

at Citrix.Fma.Sdk.ServiceCore.DelegatedAdminProvider.DemandPermission(String operation, ServiceRegistrationStates localAdminStates)

at Citrix.Fma.Sdk.ServiceCore.ServiceCore.<>c__DisplayClass23_0.<GetServiceStatus>b__0()

at Citrix.Fma.Sdk.ServiceCore.ServiceCore.CheckedCall[T](String name, Func`1 operation, Func`2 defaultValue, Enum code)

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