Each ¨ - behavior of func without parameter

[Otto Diesenbacher-Reinmüller]

Dear APLers,

I don't think this is a bug, but intentionally:

Doing f.e.:

{ 3 } ¨ ⍳5

results in gnu-apl to an error:

SYNTAX ERROR
      λ1¨⍳5
      ^  ^

In other APLs, this works just fine, f.e. dyalog (or even april):

      { 3 } ¨ ⍳5
3 3 3 3 3

More general without Each/¨, f.e. 
  { 3 } 55

results in gnu-apl in

3 55

but in dyalog (and others) in

3

What's the background of this different behavior in gnu-apl? I also
couldn't find any hint in IBMs APL2 Reference for this behavior.

br & and many thanks for any hint!

br Otto