Hello Jürgen, here comes an other corner case.
The following two cases work as expected. (⍳16)⍴'a' SYSTEM LIMIT (rank) (⍳16)⍴'a' ^ ^ (⍳16)⍴⊂'a' SYSTEM LIMIT (rank) (⍳16)⍴⊂'a' ^ ^ This case fails to detect the SYSTEM LIMIT and Kills the session: 12 10 13 14 12 14 13 14 ⍴ ⊂'0123456789abcdef' Killed And some more oddities... ⎕WA 14988140544 ⍴12 10 13 14 12 14 13 14 ⍴ ⊂'0123456789abcdef' WS FULL ⍴12 10 13 14 12 14 13 14⍴⊂'0123456789abcdef' ^ ^ ⍴10 10 10 10 10 10 10 10 ⍴ ⊂'0123456789abcdef' Killed (Getötet) Best Regards, Hans-Peter
