Vray materials in 3ds max

[Anonymous]

Good evening everyone ! I use vray materials or in general other materials (before vray i used to use mental ray ) ,  but sometimes when i open the programm again after one or two days, the materials are missing ! Is there any option that can save all the materials before closing the programm ?  Thank you!

[planner_matlabi]

hi

you change material Path name

For exmaple   ---> material path ---->  C:\3dmax\material

you change paht --->  C:\3dmax\material01

end of work , create save archive your work