Iray DLL causing AppCrash

I built a scene of V4.2 wearing a shirt, 4 lights and 4 planes to act as walls.
Then the Iray DLL causes a crash in DAZ 4.10. I just reformatted my desktop, 19 days ago and reinstalled DAZ.
Crash Report, attached.
zip

zip

DAZStudio_error_report_180112-085327.zip
131K
Comments
Could be any number of problems - Here is a similiar thread that might give you some ideas..
https://direct.daz3d.com/forums/discussion/120766/iray-crashes-ever-time-i-use-it-now
First thing I would try is to reinstall the Nvidia driver. Second thing is to check that your antivirus hasn't done something stupid. Norton and AVG are particularly noted for this.