id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30318	Add new system check message when custom error handler 'path.to.view' cannot be imported	Alasdair Nicol	Alasdair Nicol	"#29642 added checks for the signatures of custom error handlers.

When the 'path.to.view' cannot be imported, it raises ModuleNotFoundError or ViewDoesNotExist, as seen in this Stack Overflow question:

https://stackoverflow.com/q/55481810/113962

I suggest we catch the exception, and add another check code, e.g.

{{{
* **urls.E008**: The custom ``handlerXXX`` view ``'path.to.view'`` cannot be imported.
}}}"	Bug	closed	Core (System checks)	2.2	Release blocker	fixed			Ready for checkin	1	0	0	0	0	0