Hi, welcome aboard. I suggest that you wander over to the Tutorials and browse through the section called "Welcome to the Monastery". It contains some excellent tips on how to get the most out of this site. I hope you'll register as a user and stick around.

Now, getting to your problem Since I can't see proof that says otherwise, I'm going to believe Perl, since I find it is usually right when it complains. I think you have, probably quite unwittingly, redefined Read_text_File. Did you try to prototype that subroutine? Have you used your editor (or grep) to search the file for the string 'Read_text_File'? You'll need to show some code if you want more help.