Hi Brian, I guess the ordering of the styles may vary with the multithreaded loading.

Does it become steady if you set [Settings] FileLoaderThreadLimit=1 in moi.ini ?

I should be able to improve that by sorting objects into their original order within the file after the multithreaded processing is finished. That's being done currently for 3DM files but not for STEP/IGES/SAT files.

- Michael