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

Hi Tom,

I wasn't aware there was a 5.1 version. I installed it and I got it working ok now. I'm building and deploying on my dev environment.
One note: after installation of 5.1 I had to alter the registry in order to be able to make a build.
I needed to copy the values from HKEY_LOCAL_MACHINE/SOFTWARE/Wow6432Node/DeploymentFrameworkForBizTalk to
HKEY_LOCAL_MACHINE/SOFTWARE/DeploymentFrameworkForBizTalk. I've seen this earlier with version 5.0 though.
Since it's a 64-bit server, the registry values end up in the Wow6432node registry key. Apparently the framework isn't aware (enough) that the server where the build is being made is 64-bit? Minor issue imo, I can live with the workaround ;).

Thanks,
Nils