RendererService: System.Exception: The Conversion timed out

Server stack trace: 
   at CMI.Renderer.DocumentRenderer.DocumentRenderer.Render(Guid rendererGuid, RenderingParameter[] renderingParameters, Byte[] inputBytes, String inputExtension, Byte[]& outputBytes, String& outputExtension)
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

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 CMI.DomainModel.IRenderer.Render(Guid rendererGuid, RenderingParameter[] renderingParameters, Byte[] inputBytes, String inputExtension, Byte[]& outputBytes, String& outputExtension)
   at CMI.Server.RendererServiceImplementation.RendererServiceImplementation.Render(Guid rendererGuid, RenderingParameter[] renderingParameters, Byte[] inputBytes, String inputExtension, Byte[]& outputBytes, String& outputExtension) in C:\CMI\Entwicklung_13_04\MetaTool\CMI.Server.RendererServiceImplementation\RendererServiceImplementation.cs:line 95