σ instead of μ

Attestations in Trismegistos Text irregularities

This text irregularity has been corrected by a modern editor 9 time(s) in Trismegistos Text irregularities;
   in 3 different contexts (before and after);
       following 2 different groups;
       preceding 3 different groups.

Less than 10 attestations. For a network of text irregularities based on co-occurrence in the same text, see here

Contexts of this text irregularity (σ instead of μ)
Context	Frequency
after ∅ and before ου	6	(all types of errors in this context)
after ∅ and before οι	1	(all types of errors in this context)
after α and before η	1	(all types of errors in this context)

Graphemes preceding this text irregularity (σ instead of μ)
Context	Frequency
after ∅	7	(all types of errors in this context)
after α	1	(all types of errors in this context)

Graphemes following this text irregularity (σ instead of μ)
Context	Frequency
before ου	6	(all types of errors in this context)
before η	1	(all types of errors in this context)
before οι	1	(all types of errors in this context)