WHAT IS GOING ON ANYMORE Seriously, what happened to A%? It's supposed to be an array, but it's not? DEF STR_TO_ARR S$ OUT A%[] WHILE LEN(S$)!=LEN(A%) PUSH A%,ASC(S$[LEN(A%)-1]) WEND S$="" END

I haven't used variable types much... but if A% is a number variable/array, you might need to use VAL() to convert the $tring to a number or integer.

ASC converts the string into a character code, which is an integer.

Maybe it suddenly turned into a multidimensional array?

Could you refer to the following program? DEF STR2ARR S$,A% VAR D WHILE LEN(A%)>0:D=POP(A%):WEND WHILE LEN(S$)>LEN(A%) PUSH A%,ASC(S$[LEN(A%)]) WEND END DIM C%[100] STR2ARR "SMILEBASIC",C% FOR I=0 TO LEN(C%)-1:?C%[I]:NEXT I

Still get an error. Here's all the code. (You can still get the length of a 2D array however, so I don't know why it would error on that line.)

I'd suggest using... DEF FUNCNAME PARAM RETURN RETVAL ...rather than... DEF FUNCNAME PARAM OUT RETVAL ...for functions with a single return value. It's a lot more straightforward in terms of the return value's initialization and the value returned itself.

You should not use neither OUT nor RETURN for a reference of an array. I recommend you to modify your program as follows. DEF STR_TO_ARR S$ OUT A%[] -> DEF STR_TO_ARR S$,A%[]

Thanks, Hanzo! I fixed the bug!… mostly…