Has anyone tried using a JavaScript External Library with 64bit InDesign?

I have an event listener that calls a JavaScript file. The JS script uses a c++ external library. All works fine with 32 bit InDesign including the new cloud version, but I get an "I/O error" when trying to load the library from  a 64bit InDesign generated event. I have even tried using the sample project BasicExternalObject and get the same error.

Any thots would be greatly appreciated.

Ron R