Encounter problem -- preCTS optimization. ( Channel of slave 0 does not exist).

I was running some pre clock tree synthesis optimizations on my decoder design. I get the following error : ( verbose )

**WARN: (PRL-38):    Slave id 0 did not come up within the specified timeout period (120 seconds). Use setDistributeHost -timeout to change the value. This may be a real error due to incorrect or incomplete platform/machine specification provided via setDistributeHost to your distributed resource management system (LSF/Sun Grid Engine etc.). If running locally (setDistributeHost -local), the current machine may be overloaded with too many jobs and swapping (check free memory and CPUs with top). For local runs, consider reducing the number of CPUs you are using via the setMultiCpuUsage command or free up some memory by killing other memory intensive processes.

**ERROR: (PRL-5):    Not all slave processes were able to start.  Check that your distributed hosts are valid and restart Encounter.**ERROR: (PRL-0):    Channel of slave 0 does not exist

I tried many options to get it run successfully but so far I am not successful. I tried to reduce the number of cores and it still has this problem. I also tried to run this locally but again I face the same problem. Could anyone who has faced similar problems before help me understand the root cause of this problem and help me debug this issue.

Thanks,

Gopal.