Summary

When starting a business process after upgrading from Workflow 9.2 to Laserfiche Workflow 9.2.1, you may receive the following error message

Could not load file or assembly 'System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Resolution

The upgrade process may not properly update a binding redirect to point to the latest version of System.Web.Mvc.dll.

Note: This issue does not affect new installations of Laserfiche Workflow 9.2.1.

Manually update the Web.config file in C:\Program Files\Laserfiche\Laserfiche Workflow 9\Web\Laserfiche.Workflow.Web.

1. Browse to C:\Program Files\Laserfiche\Laserfiche Workflow 9\Web\Laserfiche.Workflow.Web and open the Web.config file with a text editor.
2. look for the following block:

   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
         <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>

3. Change the newVersion attribute's value to 3.0.0.1:

   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
         <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
         <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.1" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>

4. Save the change to the Web.config file.