saturne simulation fail

Hi runnign a tuturial i get this error (error log file):


/opt/saturne/installer/ncs-2.0.0-rc1/src/base/cs_base.c:765: Fatal error.

Sub-routine calling iasize: TRIDIM
Memory needed in ia (number of integers): 2776
available: 1980

----> Define iasize to a value at least equal to 2776 integers).


Call stack:
1: 0x7f7892671215 <iasize_+0xc5> (libsaturne.so.0)
2: 0x7f7892805574 <tridim_+0x4174> (libsaturne.so.0)
3: 0x7f789264ffe5 <caltri_+0x5085> (libsaturne.so.0)
4: 0x7f789262b1cb <cs_run+0x83b> (libsaturne.so.0)
5: 0x7f789262b4b5 <main+0x1f5> (libsaturne.so.0)
6: 0x7f788fd81c4d <__libc_start_main+0xfd> (libc.so.6)
7: 0x40a259 <> (cs_solver)
End of stack

It seems that I don't enough memory...
I running daturne on a pentium i7 with 8 gb of RAM, I think my hardware can fit the needs of saturne...is there some option in the gui i need to check?
thank you in advance.