[comp.sys.mac.hypercard] Debugging HyperCard scripts

aisl@ur-tut.UUCP (Larry Landry) (01/16/88)

I am trying to make a debugging aid for HyperCard.  I have the HyperCard
Script Language Guide from APDA dated 11 August 87.  In this documentation
there is a command called cantUnderstand that is supposedly sent to the
open card when an incorrect HyperTalk statement it executed.  

I don't seem to get this message when I give an invalid instruction.  I 
just get the standard Can't Understand script dialog.

In looking for possibly another name for this message, I stumbled across
a command called 'debug'.  You can either turn it on or off, but I haven't
figured out what it does yet.

I need some method of testing a HyperTalk command or getting back control
with an error message when an incorrect command is executed.  Has anyone
has figured out how to do this?