The following might do:
cd /home/apptmt/park && ls *.txt > reportgen.lst
I suggest to use a different filename extention for your report file or save it to another location to avoid making it part of your *.txt list.
Thank you Dude!
I just found out that
cd /home/apptmt/park;ls *.txt > reportgen.lst works for me...
I will try this one as well... thank you very much...