$ cat pm_1168253_reformat_input_OUTPUT.txt
cat: pm_1168253_reformat_input_OUTPUT.txt: No such file or directory
$ pm_1168253_reformat_input_WITH_FILES.pl
$ cat pm_1168253_reformat_input_OUTPUT.txt
H432165,20151209,SINGLE LINE FOR THIS ONE
H123456,20151209,THIS IS A TEST TO COMBINE ALL MY MATCHING LINES INTO THE FIRST LINE THAT MATCHES.
H654321,20151209,MATCH LINES FOR THIS ACCT INTO THE TOP LINE OF THE ACCT