* Does Maya print any messages to the Script Editor before crashing?
* Does Maya save a crash dump file?
You may send me any of the above info, the OrnatrixMaya20xx.log file from the %TEMP% directory, and your scene too if you are OK to share it.
You may also first try installing the latest nightly build 4.1.8.33735 and see if it will fix the crash.
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev