Error in analysing virus data

[capemaster]

Hi, this is the error i get from the terminal:

Traceback (most recent call last):
  File "./shorah.py", line 142, in <module>
    keep_files=options.k, alpha=options.a)
  File "/home/capemaster/Desktop/SHORAH/shorah-master/dec.py", line 399, in main
    proposed[beg] = (get_prop(dbg_file), j)
  File "/home/capemaster/Desktop/SHORAH/shorah-master/dec.py", line 252, in get_prop
    return prop
UnboundLocalError: local variable 'prop' referenced before assignment

The tail of the dec.log is reported.

DEBUG 2014-04-16 12:06:05,696                          run_dpm 178 run  -i w-JX480631-7706-7906.reads.fas -j 54405 -t 10881 -a 0.100000 -K 20 finished
DEBUG 2014-04-16 12:06:05,696                          run_dpm 179 Child /home/capemaster/Desktop/SHORAH/shorah-master/diri_sampler returned 0
DEBUG 2014-04-16 13:30:21,533                          run_dpm 178 run  -i w-JX480631-7840-8040.reads.fas -j 56490 -t 11298 -a 0.100000 -K 20 finished
DEBUG 2014-04-16 13:30:21,534                          run_dpm 179 Child /home/capemaster/Desktop/SHORAH/shorah-master/diri_sampler returned 0
DEBUG 2014-04-16 13:30:21,534                          run_dpm 170 /home/capemaster/Desktop/SHORAH/shorah-master/diri_sampler -i w-JX480631-7907-8107.reads.fas -j 52110 -t 10422 -a 0.100000 -K 20
DEBUG 2014-04-16 14:41:19,600                          run_dpm 178 run  -i w-JX480631-7907-8107.reads.fas -j 52110 -t 10422 -a 0.100000 -K 20 finished
DEBUG 2014-04-16 14:41:19,601                          run_dpm 179 Child /home/capemaster/Desktop/SHORAH/shorah-master/diri_sampler returned 0
INFO 2014-04-16 14:41:19,601                          main 392 reading windows for start position 135
WARNING 2014-04-16 14:41:19,602                          correct_reads 227 No reads in window 135?
INFO 2014-04-16 14:41:19,602                          main 396 this is window w-JX480631-135-335

I got the same error in many platforms. I successully analysed another sample created in the way. What is going on?