Hi freinds !!!    

I got some troubles during pss simulation - receiver top simulation.
The following error reported after spectreRF simulaiton
"Internal error found in spectre during check, during IC analysis, .... ..... Insufficient memory available"
So I wondered that my system has not sufficient memory and checked memory size. It has 7GB physical memory and 20GB swap memory.  
Could you please give me advice for resolving this problem?