Questions on runtime error

Ok so the mod im a dev for Perisno... i have a lot of people telling me that they are getting a random runtime error when first starting up the mod... they usually download Perisno off of the workshop http://steamcommunity.com/sharedfiles/filedetails/?id=316610148&tscn=1411517701 and get a runtime error that i have never seen before... i have never heard of people getting this error before and it lies mainly with people with macs and 32 bit os.. would anyone know what would cause this?

I was also getting those errors. Then I bought a new graphics card and they don't appear anymore. So, I guess it's lack of video memory or maybe even RAM.