Problem when threading wMUSTER

$ /home/zg2k2/I-TASSER/I-TASSER2.1/I-TASSERmod/runI-TASSER.pl -libdir /home/zg2k2/I-TASSER/I-TASSER2.1 -seqname T0644 -datadir /home/zg2k2/T0644 -usrname zg2k2 -idcut 0.3 -java_home /home/zg2k2/jdk1.7.0_21/

Your setting is:
-libdir =/home/zg2k2/I-TASSER/I-TASSER2.1
-seqname =T0644
-datadir =/home/zg2k2/T0644
-usrname =zg2k2
-runstyle =serial
-idcut =0.3
-ntemp =20
-nmodel =5
1. make seq.txt and rmsinp
2.1 run Psi-blast
2.3 run solve
2.4 run pairmod
3.1 do threading
start serial threading wMUSTER
/tmp/zg2k2/ITT0644
/home/zg2k2/T0644/wMUSTER_T0644
Exception in thread "main" java.io.FileNotFoundException: /home/zg2k2/I-TASSER/I-TASSER2.1/stride/3iz5a1.stride.7state (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(FileInputStream.java:138)
at java.io.FileInputStream.(FileInputStream.java:97)
at java.io.FileReader.(FileReader.java:58)
at e.main(e.java)
Illegal division by zero at /home/zg2k2/T0644/wMUSTER_T0644 line 559

Can anyone tell me how to deal with this problem?