`flatten-multiple-args`

Subject: FLATTEN
Category: value
Formula: =FLATTEN({1;2}, {3;4})
Canonical: {1; 2; 3; 4}

Owning divergences (2)

DV-0018 lattice: different error code — ADD, AVERAGE, AVERAGE.WEIGHTED (+5 more)
error-code lattice
DV-0032 excel: function not implemented — ARRAY_CONSTRAIN, FLATTEN
missing-function excel

Per-engine results

matches canonical diverges no fixture

Engine	Verdict	Value
gsheets	match	{1; 2; 3; 4}
excel	diverge	#NAME?
lattice	match	{1; 2; 3; 4}
ironcalc	diverge	#NAME?
hyperformula	diverge	#NAME?
libreoffice	diverge	—
formulas	diverge	#NAME?
pycel	diverge	#NAME?