AUval mysterious error codes and self closing plugin

MacOSX and iOS
#1

I get an error when trying to validate my plugin with auval.
I don’t think it is really JUCE related.

TESTING OPEN TIMES:
COLD:
Time to open AudioUnit:         380.903 ms
WARM:
Time to open AudioUnit:         18.840  ms
FIRST TIME:
FATAL ERROR: Initialize: result: -10868

The VST version works fine in Ableton Live but when I try to open the AU version it does apperently nothing.

It constructs the plugin and then immediately destructs it but I can’t trace back far enough to find out the reason.
I come as far as
CoreAudioUtilityClasses->ComponentBase.cpp OSStatus ComponentBase::AP_Close(void *self) (line 115)
in the debugger in xcode but further than that is just asm.

Not quite sure where to dig next. Any tips?

#2

According to https://www.osstatus.com/search/results?platform=all&framework=all&search=-10868
the error code seems to mean
kAudioUnitErr_FormatNotSupported

Now if that is so… why does it think my AU plugin is not supported.

#3

While having the steam up I’ll keep up with this monologue.
I figured it out, it was bad bus layout. As in haven’t made a change since older JUCE version.