Out of memory during LU factorization!! ( please help!!! )( muffler simulate )

Hey guys!
I have a muffler that i will simulate by acpr interface. I used this pdf for do this job:

www.mediafire.com/?zzvc170c23s3zvt

I have a problem when i solve this projcet.
i take a picture of the error:

www.mediafire.com/?a68qyp2pwpk6vr8

the error:

"Failed to find a solution for the initial parameter.
Out of memory during LU factorization.
Returned solution is not converged."


and this is my project:

www.mediafire.com/?45134a1swjep353

how to solve this problem?
can you solve this problem for me?
please help me, because i'm very necessary to this project!