Problem:

Microsoft.XLANGs.RuntimeTypes.RuntimeInternalErrorException
at
Microsoft.XLANGs.Core.Part.GetDFDef(String dottedPath)

Uncaught exception terminated service Namespace.OrchName(GUID), instance GUID


Exception type: RuntimeInternalErrorException
Source: Microsoft.XLANGs.Engine
Target Site: Microsoft.XLANGs.RuntimeTypes.DistinguishedFieldDefinition GetDFDef(System.String)

Solution: I had an old version of the schema deployed. I simply recompiled my schema on which my orchestration was dependent, redeployed it, and it worked.

The problem was a distinguished field, still not exactly sure why redeploying fixed it.