Hi @kvijayasarathi!
In the documentation it says: “You can choose bigger machine for the analysis. By choosing it, you can provide the solver with more memory under which the analysis can be easily solved. For example, for a bigger mesh i.e. more than a million 3D elements, assigning analysis to 1,2 or probably 4 cores under Simulation Control will lead to this error. Try to assign at least 8, 16 or 32 cores.” Thus mesh size plays a big role and needs to be taken into account for the simulation.
Please share your project with us to have a closer look at this issue and make sure it is set to public.
On top of that , my colleague @rszoeke posted an explanation about this issue a while ago: Memory Allocation Problem
All the best!
Jousef