[PD] Ability to access error messages from patch

[Roman Haefeli]

On Mon, 2021-06-14 at 22:39 +0200, Roman Haefeli wrote:
> 
> 
> [O]
> |
> [catch]
> |    |
> |    [pd do_something_on_error_condition]
> |
> [read /tmp/foo.txt(

After reading Christof's mail, I realize I got
the order wrong. The other way around:

1) pass original message through right outlet
2) report error state on left outlet

would probably make much more sense.

Roman

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