[Zope] Error messages from external methods

[Joe Goldthwaite]

Something strange happened after I upgraded to Zope 2.7.2.  If there was a
run time error in my external method, it used to return the module and line
number as part of the error message.  Now it just returns an error
description without the line information.  Here's an example;

   Site Error

   An error was encountered while publishing this resource.

   Error Type: KeyError
   Error Value: 'P'

   Troubleshooting Suggestions

       * This resource may be trying to reference a nonexistent object or
variable 'P'.
       * The URL may be incorrect.
       * The parameters passed to this resource may be incorrect.
       * A resource that this resource relies on may be encountering an
error.

   For more detailed information about the error, please refer to the error
log.

   If the error persists please contact the site maintainer. Thank you for
your patience.


I upgraded to Zope 2.7.3 in the hope that the line numbers would start
working again but no luck.  Is there an option that controls this?  If not,
is there a fix that will get the line numbers working again?

Now that I think about it, it may be related to some changes I made trying
to get the Wing debugger working with Zope.  I'll follow up on that thought.
If anyone has any insite to this problem, I'd appreciated it.

Thanks,

Joe Goldthwaite