$princ is an AoA, an array whose elements are array refs. You are passing one of those array refs to add_more, which you store as $data. However, $data->[0] is a scalar, not an array ref, hence the error message.

Dum Spiro Spero

In reply to Re: Can't use string as an ARRAY ref by GotToBTru
in thread Can't use string as an ARRAY ref by Anonymous Monk

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