estudiante

my university have a cluster, in the cluster stay i-tasser and i run this program in the cluster but i have a problem with psi-blast and i don't know why
my error is:
2.1 run Psi-blast
blast cmd = /hpcfs/apps/i-tasser/5.1/blast/bin/blastpgp -b 1000 -j 3 -h 0.001 -d /hpcfs/home/lf.ariasr/itasser/proyect1/nr/nr -i protein.fasta -C psitmp.chk -Q pssm.txt > blast.out
/hpcfs/apps/i-tasser/5.1/blast/bin/blastpgp is not working properly, please check

how i can solve this?