[PD] finding error messages origin

[tim]

Hi list,

I have a rather large patch running an installation.
There is an errormessage flooding the pd window, something in the lines 
of 'urn doesn't understand floats'
I have quite some urn objects scattered around the patch and subpatches.
I suppose I have one urn somewhere receiving a float instead of a bang.
What's the best way to find the offending one ?

thanks!
Tim