Of course it is, its exactly the same. If you keep hitting delete, you'll even get the same error message. 
page 0 does not exist at tk.notebook.add.delete.pl line 20
page -1 does not exist at tk.notebook.add.delete.pl line 20
page -2 does not exist at tk.notebook.add.delete.pl line 20
page -3 does not exist at tk.notebook.add.delete.pl line 20
page -4 does not exist at tk.notebook.add.delete.pl line 20
page -5 does not exist at tk.notebook.add.delete.pl line 20
page -6 does not exist at tk.notebook.add.delete.pl line 20
page -7 does not exist at tk.notebook.add.delete.pl line 20
page -8 does not exist at tk.notebook.add.delete.pl line 20
page -9 does not exist at tk.notebook.add.delete.pl line 20
page -10 does not exist at tk.notebook.add.delete.pl line 20
page -11 does not exist at tk.notebook.add.delete.pl line 20
page -12 does not exist at tk.notebook.add.delete.pl line 20

[download]
You don't provide enough code to figure out why nmap3 doesn't exist

In reply to Re^3: Dynamic tab creation/destuction with Tk::Notebook by Anonymous Monk
in thread Dynamic tab creation/destuction with Tk::Notebook by thefinn

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