Hello,

I am attempting to use the tin.py script in the RSeQC package, on BAM files generated by STAR aligner.

When running tin.py, I end up with the following error:

```
/python-2.7.15/lib/python2.7/site-packages/numpy/core/fromnumeric.py:2957: RuntimeWarning: Mean of empty slice.
out=out, **kwargs)
/python-2.7.15/lib/python2.7/site-packages/numpy/core/_methods.py:80: RuntimeWarning: invalid value encountered in double_scalars
ret = ret.dtype.type(ret / rcount)
/python-2.7.15/lib/python2.7/site-packages/numpy/core/_methods.py:135: RuntimeWarning: Degrees of freedom <= 0 for slice
keepdims=keepdims)
/python-2.7.15/lib/python2.7/site-packages/numpy/core/_methods.py:105: RuntimeWarning: invalid value encountered in true_divide
arrmean, rcount, out=arrmean, casting='unsafe', subok=False)
/python-2.7.15/lib/python2.7/site-packages/numpy/core/_methods.py:127: RuntimeWarning: invalid value encountered in double_scalars
ret = ret.dtype.type(ret / rcount)
@ 2018-06-09 12:14:41: Processing CmusAligned.sortedByCoord.out.bam
```

I don't know where to start fixing this/don't know where the problem comes from, so any guidance would be much appreciated!

freuv

I don't see an error, just warnings.