Users have reported a DLL error running the Safety Factor Calculations in RockPack III on a Windows 10 64-bit computer:   Class not registered. You need the following file to be installed on your machine. MSSTDFMT.DLL.   This is a DLL which is apparently not installed with newer versions of Windows, and it is required by RockPack III.   We have found that one easy solution to this problem is to install the RockPackIII Plane2Beta Patch, which is described on the