cput exceeds for some of my simulations (local standalone I-TASSER installation)

Hello Sir/Madam:

I have a small problem with some of my PBS jobs getting killed (see below for the contents of some of *.err fiels)
because of cput exceeding the limit. The protein that I am modeling has 320 residues. I am running jobs on a local cluster
( Dual processor Quad-core system, Intel Xeon based system; x5560, x86_64, 2.8GHz, ~74GB memory)

Looking at the perl script, runI-TASSER.pl, I think the cput for the template PBS scripts are being set
as follows:

$walltime="walltime=$hour:59:00";

Is it okay to change the variable 'hour', or is there a different way of doing it?

I also ran a job for the same system mentioned above on your online server. It ran successfully with no problems.
Do you set the cput parameter for your PBS batch jobs different than that followed in the "runI-Tasser.pl"?
Any help would be greatly appreciated.

Thanks for your time.

Ravi

----------------------------------
[ravi@abcc2 hsfrp1]$ cat err_HSFRP1sim_4A
=>> PBS: job killed: cput 86424 exceeded limit 86400
[ravi@abcc2 hsfrp1]$ cat err_HSFRP1sim_3A
=>> PBS: job killed: cput 86424 exceeded limit 86400
[ravi@abcc2 hsfrp1]$ cat err_HSFRP1sim_2A
=>> PBS: job killed: cput 86422 exceeded limit 86400