Fortran runtime error: Permission denied

We have recently installed I-TASSER 4.3 with an expert user of I-TASSER who has it running successfully on his machines.
This installation is meant to run on a cluster and we are testing out the execution on individual cluster nodes. We are however getting these errors as shown below.

1. make seq.txt
2.1 run Psi-blast
2.2 run PSSpred
3.1 do threading
/local/scratch/proknow/init.dPPAS
start serial threading dPPAS
/tmp/proknow/LMlomets
/local/scratch/proknow/dPPAS_lomets
At line 273 of file ppa1.f
Fortran runtime error: Permission denied
Illegal division by zero at /local/scratch/proknow/dPPAS_lomets line 356.
hostname: compute-11-2.local
starting time: Thu May 21 10:39:05 PDT 2015
pwd: /tmp/proknow/LMlomets
running zalign .....

/local/scratch/proknow/init.MUSTER
start serial threading MUSTER
/tmp/proknow/LMlomets
/local/scratch/proknow/MUSTER_lomets
At line 354 of file zal33.f
Fortran runtime error: Permission denied
Illegal division by zero at /local/scratch/proknow/MUSTER_lomets line 599.
hostname: compute-11-2.local
starting time: Thu May 21 10:39:05 PDT 2015
pwd: /tmp/proknow/LMlomets
running Psi-blast .....
running zalign .....

We checked the source but were unable to fix it.
Any help is much appreciated.