Out of memory during LU factorization

Hi there,

I am a new member in the COMSOL community. I am trying to solve a simple 3D problem having diffusion and chemical reaction within the subdomain. However, I am getting this message "out of memory during LU factorization." Is my computer running out of memory to solve this particular problem or should I use a better solver to solve this problem? Could anyone share his/her experiences with COMSOL?

Many thanks,

Mohammed