I have seen the below errors that required a server reboot to fix the issue:
Error in GUI:
Error in ULS:
03/06/2014 17:43:45.29 w3wp.exe (0x3B38) 0x574C Excel Services Application Excel Calculation Services 89rs Exception ExcelServerApp..ctor: An unhandled exception occurred during boot. Shutting down the server. Microsoft.Office.Excel.Server.CalculationServer.Interop.LoadDllException: Failed to load engine dll.Acceso denegado. at Microsoft.Office.Excel.Server.CalculationServer.Interop.EngineInterop.LoadDll(EngineFlags engineFlags, String binPath, String muiPath, String ppPath, IRequestTelemetryEvents requestTelemetryEvents) at Microsoft.Office.Excel.Server.CalculationServer.ExcelServerApp.Initialize() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlock, FinallyBlock finallyBlock) StackTrace: at Microsoft.Office.Server.Native.dll: (sig=35339f9c-8871-4ef1-9118-9c1bd0cb6598|2|microsoft.office.server.native.pdb, offset=131CE) at Microsoft.Office.Server.Native.dll: (offset=21B4D) 47bf7a9c-949d-c0e3-278b-d714155b5356
Error in GUI:
Error in GUI:
03/03/2014 16:46:13.09 w3wp.exe (0x3EA4) 0x4120 Excel Services Application Data Model 27 Monitorable Uncaught CLR exception crossing the Interop boundary: Microsoft.AnalysisServices.Streaming.ServerNotFoundException: No eligible servers meet the operation's requirements. ---> System.InvalidOperationException: Sequence contains no matching element at System.Linq.Enumerable.First[TSource](IEnumerable`1 source, Func`2 predicate) at Microsoft.AnalysisServices.Streaming.OnPremise.MemoryBasedLoadBalancer.BeginOperation(OperationRequirements requirements, IEnumerable`1 availableServers) --- End of inner exception stack trace --- at Microsoft.AnalysisServices.Streaming.OnPremise.MemoryBasedLoadBalancer.BeginOperation(OperationRequirements requirements, IEnumerable`1 availableServers) at Microsoft.AnalysisServices.Streaming.OnPremise.LoadBalancer.GetLoadBalancedOperation(Func`1 onBegin) at Microsoft.AnalysisServices.Streaming.OnPremise.Database.Loading.Create() at Microsoft.AnalysisServices.Streaming.OnPremise.ServerPool.<>c__DisplayClass9.<Microsoft.AnalysisServices.Streaming.OnPremise.IServerPool.CreateConnection>b__8(Guid id) at Microsoft.AnalysisServices.Streaming.Internal.KeyedReferenceCountedEnumeration`2.Node.<>c__DisplayClassc.<.ctor>b__a() at System.Lazy`1.CreateValue() at System.Lazy`1.LazyInitValue() at Microsoft.AnalysisServices.Streaming.Internal.KeyedReferenceCountedEnumeration`2.Node.GetReference() at Microsoft.AnalysisServices.Streaming.Internal.KeyedReferenceCountedEnumeration`2.GetOrCreateReference(TKey key, Func`2 valueFactory) at Microsoft.AnalysisServices.Streaming.OnPremise.ServerPool.Microsoft.AnalysisServices.Streaming.OnPremise.IServerPool.CreateConnection(Guid imageId, Func`1 allocationFactory) at Microsoft.AnalysisServices.Streaming.OnPremise.Database.Loading.EstablishConnection() at Microsoft.AnalysisServices.Streaming.OnPremise.Database.ConnectWithoutOperationSetup() at Microsoft.AnalysisServices.Streaming.OnPremise.Database.Microsoft.AnalysisServices.Streaming.IDatabase.Connect(DatabaseConnectionProperties props) at Microsoft.AnalysisServices.Streaming.Interop.StreamingServerPoolModule.Microsoft.AnalysisServices.Streaming.Interop.IStreamingConnector.Connect(SSPM_CONNPROPS in_connprops, SSPM_CALLBACKS in_callbacks) d1c4799c-d568-c0a0-395b-bd0ecb4a84f0
When in doubt, reboot.