Read access to an argument’s properties

Hello,

I write a formula template and need to look at some properties of the arguments.

Here’s the code of the formula “MyFormula” :
[code]Arguments sig
MessageBox “MyFormula – Signal name = ” : sig.Name // second message box[/code]

Here’s the code I use to call “MyFormula” :
[code]MessageBox “Signal name = ” : MySignal.Name // first message box
MyFormula ( MySignal)
[/code]

FlexPro dispays the first message box, but reports an error “Read access to the object property or the list element ‘Name'”, at the ligne 2 in “MyFormula”.

What’s wrong in my FPScript ?
Is It possible to have read access to the argument’s properties ?

Best regards.