Olivier Deckmyn writes:

I wonder how I can display error traceback inside standard_error_message (in fact, it's only to automatically email it in case of error, with REQUEST, errortype, etc...) ... I need to display/use it through a <dtml-var xxx> tag, so that I can insert it in the body of my debug email. Not too easy.

The traceback is generated by "RESPONSE._traceback". As you see, it has an "_" prepended, thus you can not use it from DTML. There is also a "RESPONSE.exception", but it modifies the response body directly. You could try to create an external method that has "RESPONSE" as parameter and returns "apply(RESPONSE._traceback,sys.info())". Dieter