This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

Hi guys,

I am trying to load a custom assembly with “SQL Server MDs Workflow Integration”. However, I get the following error:

Error loading workflow type extender:

System.BadImageFormatException: Could not load file or assembly 'WorkflowService' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

File name: 'WorkflowService'

The WorkflowService requires ASP.NET 4.0. But, as you can see in the log bellow here, the .Net v2.0 is loaded instead.

LOG: This bind starts in default load context.

LOG: Using application configuration file: C:\Program Files\Microsoft SQL Server\110\Master Data Services\WebApplication\bin\Microsoft.MasterDataServices.Workflow.exe.Config

LOG: Using machine configuration file fromC:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\machine.config.

LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).

LOG: Attempting download of new URLfile:///C:/Program Files/Microsoft SQL Server/110/Master Data Services/WebApplication/bin/WorkflowService.DLL.

ERR: Failed to complete setup of assembly (hr = 0x8013101b). Probing terminated.

- I have set the Application pool to v4.0.

- ReInstalled .Net 4.0

- Run the ASPNET_regiis.exe

- I have even added the following settings into web.config with no results:

                <startup>
                                <supportedRuntime version="v4.0" safemode="true"/>
                                <requiredRuntime version="v4.0" safemode="true"/>
                </startup>

Does anyone have experience with this issue?

This is my code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.MasterDataServices.WorkflowTypeExtender;

using System.Xml;
using System.Data.SqlClient;
using System.Diagnostics;

namespace MDS
{
    public class WorkflowService : IWorkflowTypeExtender
    {
        void IWorkflowTypeExtender.StartWorkflow(string workflowType, XmlElement dataElement)
        {
            EventLog.WriteEntry("MDS", "WORKS?", EventLogEntryType.Error);

            switch (workflowType)
            {
                case "BR_Relationship_Default_Items":
                    ExecuteBusinessRule_Items_Defaults(dataElement);
                    break;
                default:
                    break;
            }
        }
        private void ExecuteBusinessRule_Items_Defaults(System.Xml.XmlElement message)
        {
		.....           
        }

     }
}

Project setting: