"Internal error in boundary respecting." and "Out of memory during assembly."

Dear All

I have two errors in my microfluidic models about "Internal error in boundary respecting." and "Out of memory during assembly.". At first I tried to simulate the flow of the overall 3D structure but it showed an error about

-Feature: Compile Equations: Time Dependent(sol1/st1)
-Error: Problem setting up multigrid.

With these details.

Problem setting up multigrid.
Failed to build feature 'bl1' in sequence 'mesh1'.
Failed to generate mesh for domain.
- Domain: 2
Failed to respect boundary element edge on geometry face.
- Face: 33
- x-coordinate: 4839
- y-coordinate: -4018.97
- z-coordinate: 10
Internal error in boundary respecting.

To check whether my program work properly or not, I tested it by the simulation with the simpler 3D straight microchannel and the error is shown below.

Out of memory during assembly.

My laptop specs are window7, intel core 2 duo, 2.00 GHz, 32-bit OS, 4 GB (3.00 GB usable). I'm not sure that these are tha cause of my problems or not, and what I should do to solve these problems.

Thanks a lot and best regards,
Kittatat