runCOFACTOR fails to run with the "Undefined subroutine &main::get_absolute_path" error-

Hello Forum Admin:

I am using the latest version (ver 4.1) of I-TASSER suite and the latest template libraries (downloaded in the last few days). This question about the stand-alone version of I-TASSER.
My OS is
> uname -ar
Linux fr-s-hpc-a1-26 3.2.0-64-generic #97-Ubuntu SMP Wed Jun 4 22:04:21 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

When I run runCOFACTOR after I had finished modeling using ITasser, I get the "Undefined subroutine error" (shown below). Can someone help me with this issue?

Thanks for your time

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setenv libdir /opt/nas/dev/I-TASSER/I-TASSER4.1
setenv MYHOME /scratch/tmp/ravi/IT13/NM_004364

$libdir/I-TASSERmod/runCOFACTOR.pl -pkgdir ${libdir} -libdir ${libdir} -protname NM_004364 -model model1.pdb -datadir ${MYHOME}
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Undefined subroutine &main::get_absolute_path called at
/opt/nas/dev/I-TASSER/I-TASSER4.1/ITASSERmod/runCOFACTOR.pl line 62.