Thanks for the help. I gave your code a try but it is only printing the line DATA. What I was looking to do is print all lines in the file after STRUC20. And also all files online contain the line STRUC20 once and they will all contain that line.
Thanks again for all the help.

Example file contents of file1.rtsd001

date time
blah blah
test test
STRUC20  #Code should look for this line and print everything after it
+.
need lines
need lines
print these lines
[download]