eDrawings API - unable to find fnp security runtime shared object

Hi all


Have been using eDrawing API in c# successfully in SW 2019 and SW2020. Now when upgrading to SW2021 it has stopped working. No code has changed.


When instantiating the eDrawings API code I receive error message:


unable to find fnp security runtime shared object


Has anyone seen this error before and if so what could be the problem?

SolidworksApi/macros