What Am I Missing (HP-71B)

[cruff]

(11-03-2014 10:45 AM)Les Bell Wrote:  Yes, the real problem is the "Illegal context" error messages on what looks like just about the simplest DEF FN examples. I must be overlooking something very obvious, but I can't think what. . .

The manuals and some testing suggest that a DEF FN can not accept an array as a parameter because it says all parameters are passed by value. Later on, the documentation for subprograms mentions array parameters can be passed by reference, but would require an output parameter: CALL DOT(A,B,D)