My workflows are custom developed workflows using Visual Studio 2013. The Visual studio is migrated from VS 2012 3.5 framework to VS 2013 4.5 framework and SharePoint environment is also migrated from 2010 to 2013.
We have deployed the solution using 3.5 framework and produced the dll. Later we changed the framework to 4.5 and deployed it to produce the latest version dll.
For the new workflows to work we need the oldd dependencies also.
old version dll was deployed in the following path "C:\Windows\assemply\GAC_MSIL-----\3.000----.dll" New version dll was deployed in the following path "C:\Windows\Microsoft.NET\assemply\GAC_MSIL-----\3.000----.dll" All the new workflows are working fine as we started using the new version of dll, but the old versions are not working with the new version.\
If we are using the old version dll, the new workflows are getting the "No User/Group assigned to the task" error.
So what can we do to fix the workflows issue.
Thanks in advance