I am trying to run rMATS to find differentialy expressed splicing isoforms. I get an error in the program that is the same exaclty error when I run the test of instalation and can't figure out the solution. Anybody specialist in rMATS here can helpme?

here is the log file:

2016-03-17 19:28:36,891 start mapping.. 2016-03-17 19:28:36,891 bam files are provided. skip mapping.. 2016-03-17 19:28:36,891 done mapping.. 2016-03-17 19:28:36,891 getting uniquely mapped reads or pairs 2016-03-17 19:28:36,891 getting unique SAM function.. 2016-03-17 19:28:38,487 getting uniquely mapped reads or pairs for sample_1, rep_1 is done with status 0 2016-03-17 19:28:38,487 2016-03-17 19:28:40,108 getting uniquely mapped reads or pairs for sample_1, rep_2 is done with status 0 2016-03-17 19:28:40,108 2016-03-17 19:28:41,670 getting uniquely mapped reads or pairs for sample_2, rep_1 is done with status 0 2016-03-17 19:28:41,670 2016-03-17 19:28:43,243 getting uniquely mapped reads or pairs for sample_2, rep_2 is done with status 0 2016-03-17 19:28:43,244 2016-03-17 19:28:43,244 done getting unique SAM files.. 2016-03-17 19:28:43,248 start getting AS events from GTF and SAM files 2016-03-17 19:28:43,248 getting AS events function.. 2016-03-17 19:28:43,309 getting AS events is done with status 256 2016-03-17 19:28:43,310 error in getting AS events 256 2016-03-17 19:28:43,310 error detail: Traceback (most recent call last): File "/home/tiagocastro/atalhos/programs/rMATS.3.2.1.beta/bin/processGTF.SAMs.py", line 119, in <module> group = range(int(sC)/chunk, int(eC)/chunk + 1); ## groups this line could belong to TypeError: 'float' object cannot be interpreted as an integer 2016-03-17 19:28:43,310 There is an exception in getting AS events 2016-03-17 19:28:43,310 Exception: <type 'exceptions.Exception'> 2016-03-17 19:28:43,310 Detail: