LSMW converts txt with an additional #

Hi Experts!

I am trying to run a batch input session with LSMW. (changing IT0001 subtype 9550 in PA)

I am converting the data from .xlsx to .txt, because Ineed to upload the data in text file divided by tabs.

I'm not sure what step I am missing but whenever I try to run the batch input, it puts an additioan # character to the begining, and the whole session runs to error.

Please see screenshot as well.

Thanks!