workflow Foundation 4.5 Side By Side versioning

Question

Using VS 2012 and .Net 4.5 I've developed a workflow and deployed it. Because of some business changes i had to change it. Since there's no bug on the previous version and i can let the old instances conclude i decided to use side-by-side versioning.

There's a problem though. My workflow has c# expressions. I did implemented a factory and it works only for the new instances! If a old instance get a message, the runtime returns me that the workflow (v1) is not "compiled"! Which i'm interpreting as "the service activation is working only for the latest version".

Answer 1

I've ended up finding the same answers described here: WF4.5 not compiling side-by-side c# workflows

I had to manually force the versions on the factory...