"This operation could not be completed. Please try again." when using Revit Server

Autodesk Support

Jan 3, 2025

Products and versions covered

Issue:

Intermittent failures when connecting to host server or when accessing Revit Server Administrator. 

  • The Revit Journal file shows lines similar to:
Time: M/DD/YYYY HH:MM:SS:SSS Calling: ListSubFoldersAndModels 
' 0:< Retry Count: 0 . Caught exception:  
' 0:<   Autodesk.RevitServer.Enterprise.Common.ClientServer.Helper.Exceptions.ProxyGenerationException: A problem occurred generating a proxy for the client action, Client Action = BasicAction, Target Node = REVITSERVER, Binding Name = tcpbuffer 
' 0:<     System.ServiceModel.ServiceActivationException: The requested service, 'net.tcp://revitserver/ModelService2020/ModelService.svc/tcpbuffer' could not be activated. See the server's diagnostic trace logs for more information. 
' 0:< Time: M/DD/YYYY HH:MM:SS:SSS Calling: ListSubFoldersAndModels 
' 0:< Retry Count: 1 . Caught exception:
  • The ModelService.log file shows unexpected gaps in recorded dates.
YYYY-MM-DD HH:MM:SS,SSS INFO TID(49) LOGGER(ServerLogger) MSG(BlockEnd: ModelServiceImplementation.ListSubFoldersAndModels)
YYYY-MM-DD HH:MM:SS,SSS INFO TID(246) LOGGE-26 08R(ServerLogger) MSG(BlockStart: ModelServiceImplementation.IsHostNode)
  • When browsing SVC files, you receive the following message:
Memory gates checking failed because the free memory (######## bytes) is less than 5% of total memory.  As a result, the service will not be available for incoming requests.  To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
 
Exception Details: System.InsufficientMemoryException: Memory gates checking failed because the free memory (######## bytes) is less than 5% of total memory.  As a result, the service will not be available for incoming requests.  To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.
 
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 
 
Stack Trace:
[InsufficientMemoryException: Memory gates checking failed because the free memory (######## bytes) is less than 5% of total memory.  As a result, the service will not be available for incoming requests.  To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.]
   System.ServiceModel.Activation.ServiceMemoryGates.Check(Int32 minFreeMemoryPercentage, Boolean throwOnLowMemory, UInt64& availableMemoryBytes) +121924
   System.ServiceModel.HostingManager.CheckMemoryCloseIdleServices(EventTraceActivity eventTraceActivity) +86
   System.ServiceModel.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath, EventTraceActivity eventTraceActivity) +883
 
[ServiceActivationException: The service '/ModelService2015/ModelService.svc' cannot be activated due to an exception during compilation.  The exception message is: Memory gates checking failed because the free memory (######## bytes) is less than 5% of total memory.  As a result, the service will not be available for incoming requests.  To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element..]
   System.Runtime.AsyncResult.End(IAsyncResult result) +645492
   System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath, EventTraceActivity eventTraceActivity) +232149
   System.ServiceModel.Channels.SharedTcpTransportManager.OnDuplicatedVia(Uri via) +65
   System.ServiceModel.Activation.HostedHttpRequestAsyncResult.End(IAsyncResult result) +210765
   System.Web.AsyncEventExecutionStep.OnAsyncEventCompletion(IAsyncResult ar) +166
 

Causes:

Insufficient available system memory
 

Solution:

Free up the system memory or stop services which are utilizing all/most of the system memory.
Add more memory to the Revit Server.

Additional Articles

For more articles on this error, see the following article "This operation could not be completed. Please try again" when working in Revit Server

Products:

Revit Product Family;

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