more debugging info needed.

[Paul Emsley]

Hi Guilers,

I'd like more more debugging info, I currently get something like:

Exception: (wrong-type-arg #f Wrong type (expecting ~A): ~S (pair D) (D))

I have
(turn-on-debugging)

in my begin.grg file.

I'd like to see the line number too.  Is that possible?

Thanks,

Paul.