Plugin ‘assembly can not be loaded’ error | Oracle Series

Issue

When you update an assembly through the Plugin Registration Tool or during solution import, you receive the error: assembly can not be loaded.

Unhandled Exception: System.ServiceModel.FaultException

Assembly can not be loaded.

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 Microsoft.Xrm.Tooling.Connector.CrmServiceClient.Update(Entity entity)
   at Xrm.Sdk.PluginRegistration.Helpers.RegistrationHelper.UpdateAssembly(CrmOrganization org, String pathToAssembly, CrmPluginAssembly assembly, PluginType[] type)
   at Xrm.Sdk.PluginRegistration.Forms.PluginRegistrationForm.btnRegister_Click(Object sender, EventArgs e)

Detail: 

  dfa4ceec-2fe0-4fdd-80f6-fe28a47f3e71
  -2147200995

      ApiExceptionSourceKey
      Plugin/Microsoft.Crm.ObjectModel.PluginAssemblyService

      ApiOriginalExceptionKey
      Microsoft.Crm.CrmException: Assembly can not be loaded. ---> Microsoft.Crm.CrmException: Assembly can not be loaded.
   at Microsoft.Crm.Workflow.ObjectModel.CustomActivityInfoMetadataBase.GetCustomActivityInfo(ActivityInfo activityInfo, Int32 isolationMode, Guid pluginAssemblyId)
   at Microsoft.Crm.ObjectModel.PluginTypeServiceInternal`1.SetIsWorkFlowActivityAttribute(PluginType pluginTypeArg, IBusinessEntity PluginAssembly, SandboxCustomActivityInfo& customActivityInfo, CrmPluginTypeMetadata& typeMetadata, ExecutionContext Context)
   at Microsoft.Crm.ObjectModel.AssemblyDataCanBeUpdatedValidator.ValidateInternal()
   at Microsoft.Crm.ObjectModel.PluginValidatorBase.Validate()
   at Microsoft.Crm.ObjectModel.PluginAssemblyServiceInternal`1.VerifyRegistrationAbility(IBusinessEntity pluginAssembly, Boolean createCall, ExecutionContext context, CrmPluginAssemblyMetadata assemblyMetadata)
   at Microsoft.Crm.ObjectModel.PluginAssemblyServiceInternal`1.ValidateOperation(String operationName, IBusinessEntity entity, ExecutionContext context)
   at Microsoft.Crm.ObjectModel.SdkEntityServiceBase.UpdateInternal(IBusinessEntity entity, ExecutionContext context, Boolean verifyAction)
   at Microsoft.Crm.ObjectModel.PluginAssemblyServiceInternal`1.Update(IBusinessEntity entity, ExecutionContext context)
   --- End of inner exception stack trace ---
   at Microsoft.Crm.Extensibility.VersionedPluginProxyStepBase.Execute(PipelineExecutionContext context)
   at Microsoft.Crm.Extensibility.PipelineInstrumentationHelper.Execute(Boolean instrumentationEnabled, String stopwatchName, ExecuteWithInstrumentation action, PipelineExecutionContext context)
   at Microsoft.Crm.Extensibility.Pipeline.<>c__DisplayClass3_0.<RunStep>b__0()

      ApiStepKey
      a0cdbb1b-ea3e-db11-86a7-000a3a5473e8

      ApiDepthKey
      1

      ApiActivityIdKey
      dfa4ceec-2fe0-4fdd-80f6-fe28a47f3e71

      ApiPluginSolutionNameKey
      System

      ApiStepSolutionNameKey
      System

      ApiExceptionCategory
      ClientError

      ApiExceptionMesageName
      CustomActivityInvalid

      ApiExceptionHttpStatusCode
      400

  http://go.microsoft.com/fwlink/?LinkID=398563&error=Microsoft.Crm.CrmException%3a8004501d&client=platform
  Assembly can not be loaded.
    false

    dfa4ceec-2fe0-4fdd-80f6-fe28a47f3e71
    -2147200995

    Assembly can not be loaded.
    2024-10-27T10:16:37.5529355Z
    false

Solution

Go to the project properties and update the assembly version.

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