> "Global symbol "@row1" requires explicit package name..."

That's another bug!

Tips:

• Declare my @row1 (but before entering the inner loop¹)
• Think about what $row1 is supposed to be, you already have other errors telling it's useless (which you didn't show us²)
• Try use diagnostics; to better understand your error messages³.

¹) see Coping with Scoping

²) see How (not) to ask a question

³) see diagnostics

update

I have no time to test your code, but you should at least put some efforts to properly intent it!

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