Reflection glosiness under reflection

Hello - I dont know if this is what im searching for but i dont want to start a new topic and this may fit with my problem.

I try to render a scene and everytime i hit render - Max crashs at that point when vray starts to calculate the light.

so someone tells me it may have somthing to do with the vray scene materials so i converted the whole scene withe Vray scene converter.

is it alright to check the box ?

Sometimes it seems to be working quiet well but it doesnt
so i change the dynamic Ram limit to 12gb ram (my system works with 16) so this not problem even this seems to be working but sometimes it crashes also .... so any idea? as i wrote in an other topic i could not reset vray by using solidrocks.

I think its a problem of the vray settings but how to reset them to default?

edit:
ok i dont know why but for now it works but this could not the solution to convert the scene and reset vray by setting scanline as default and switching back and increasing ram limit -

please help

Yes as you told me before but thos wont fix crashing my max ^^

so what i was asking for -

could it be the the solid rocks settings that i use causes a crash because of the materials that i use?

maybe because of the the fact that i am using multi/sub materials? as someone wrote before?

sorry for bothering you

I suggest that max crashs when i hit F9 instead of your renderbutton

ok so as you said that may the refraction reflection materials could cause this crash but how i could figure it out which one is it?

it seems to be that it doesnt help to convert the whole scene with vray scene converter
thats why im posting the image back in post #3550 cause i want to know if i have to check the box on or off ^^