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Nobel Prize for the world first dwg with current layer frozen.
(logand 1(cdr(assoc 70(entget(tblobjname "layer" (getvar 'clayer))))))
(if (= (logand 1(cdr(assoc 70(entget(tblobjname "layer" (getvar 'clayer)))))) 1) (alert "Current Layer is FROZEN !"))