[Zope] session within standard_error_message

[KevinL]

Can you set values inside the session object from within
standard_error_message?  I note that doing a request.RESPONSE.redirect
requires a "lock=1" arg, I'm wondering if session variable setting
suffers similar problems or not.

Reason I ask is, I have an app that tries to set session variables
within the standard_error_message, and debug indicates the variables are
there within that transaction, but gone on the next request from the
browser.

KevinL