I’m trying to load a custom workflow activity onto a crm server. I loaded

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Asked: June 6, 20262026-06-06T14:49:03+00:00 2026-06-06T14:49:03+00:00

I’m trying to load a custom workflow activity onto a crm server. I loaded

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I’m trying to load a custom workflow activity onto a crm server. I loaded the project onto the server and have been using the CRM Plug-in Registration Tool. The server is CRM2011 and thus supports .NET 4.0 activities. However, when I press the “Register” button (After the assembly has successfully loaded onto the Tool) the following error occurs:

`Unhandled Exception: System.ServiceModel.FaultException'1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: Action failed for assembly 'ExecuteSQLJob, Version=1.0.0.0, Culture=neutral, PublicKeyToken=914788311ab3af7d': **Assembly must be registered in isolation**.
Detail: <OrganizationServiceFault xmlns="http://schemas.microsoft.com/xrm/2011/Contracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <ErrorCode>-2147220906</ErrorCode>
  <ErrorDetails xmlns:a="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
  <Message>Action failed for assembly 'ExecuteSQLJob, Version=1.0.0.0, Culture=neutral, PublicKeyToken=914788311ab3af7d': Assembly must be registered in isolation.</Message>
  <Timestamp>2012-06-21T19:50:30.5216535Z</Timestamp>
  <InnerFault>
    <ErrorCode>-2147220906</ErrorCode>
    <ErrorDetails xmlns:a="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
    <Message>Action failed for assembly 'ExecuteSQLJob, Version=1.0.0.0, Culture=neutral, PublicKeyToken=914788311ab3af7d': Assembly must be registered in isolation.</Message>
    <Timestamp>2012-06-21T19:50:30.5216535Z</Timestamp>
    <InnerFault i:nil="true" />
    <TraceText i:nil="true" />
  </InnerFault>
  <TraceText i:nil="true" />
</OrganizationServiceFault>`

`Server stack trace: 
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)`

`Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at Microsoft.Xrm.Sdk.IOrganizationService.Create(Entity entity)
   at Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy.CreateCore(Entity entity)
   at PluginRegistrationTool.RegistrationHelper.RegisterAssembly(CrmOrganization org, String pathToAssembly, CrmPluginAssembly assembly) in C:\hbs\apps\prod\hbs\downloads\crm2011\crm2011_MicrosoftDynamicsCRM2011SDK\sdk\tools\pluginregistration\RegistrationHelper.cs:line 227
   at PluginRegistrationTool.PluginRegistrationForm.btnRegister_Click(Object sender, EventArgs e) in C:\hbs\apps\prod\hbs\downloads\crm2011\crm2011_MicrosoftDynamicsCRM2011SDK\sdk\tools\pluginregistration\PluginRegistrationForm.cs:line 452`

What does registering in isolation mean? Is it simply a matter of where the assembly is saved on the server or is it more complicated?

I’ve been following MSDN’s tutorial’s so far but can’t find an explanation for this.

Thanks!