I have a problem with the pool.reads function

When I try to pool data output from the meth.call function I obtain the subsequent error:

File "path/to/sample_merge.txt", line 1

        chr20           8179      +             CG          2             4

                       ^

SyntaxError: invalid syntax

I used both my personal data and the H1_chr20_CG_10k.txt data (creating a copy to have two files) in the extdata folder of the methylPipe package.

Any suggestion?