a little help with keypad on 18f4520 please

[aratti]

...... As i try to compile I encounter an error here
For A0 = 1 to Ret_count -1
Not quite sure why ?

Simply because variable A0 has not been declared! Add A0 var Byte to your code.

While wend loop could work as well, if properly structured.

Remember you should place two limits: Ret_Count cannot be greater then the array dimension and # command should be ignored if Ret_Count = 0.

Al.