DLL Error While Creating an In-Memory Table in SQL Server 2014
We have an internal "parity" server to protect our production and pre-production environments.  After some research and help from the #sqlhelp tag on twitter we found the location of the DLLs that SQL Server generates prior to loading into memory.  Once those were loaded into the parity server as approved locations for DLLs and EXEs - things were all good.  So this was completely an environmental error - nothing to do with SQL Server per se.