Zoo 6 crashes when selecting custom plugin product type

I’ve created (and signed) a Zoo 6 plugin for hosting licenses for a custom plugin on our office Zoo server.

As expected, the product type (sbpSof_Rh6) appears in Zoo’s “Product type” drop down list. However, as soon as this type is selected, Zoo crashes with the message below:

!ZooAdmin.Wpf no longer works. Windows can help to look for a solution. Look online or close the program.! See below for screenshot and error details.

Am I doing anything wrong? or is this a bug in Zoo 6? The exact same procedure worked for Rhino 5.

One thing I did note is that the Rhinocommon 6 templates for Visual studio from here:
seem to create a class which inherits from
rather than
IZooPlugin3 as suggested on the revised Zoo instructions webpage

However, inheriting from IZooplugin3 resulted in the same error.
In any case, it may be worth chaning the VS templates if this is indeed unintentional.

Many thanks,



Problemereignisname: CLR20r3
Problemsignatur 01: ZooAdmin.Wpf.exe
Problemsignatur 02: 6.2.18046.13391
Problemsignatur 03: 5a861cbb
Problemsignatur 04: System
Problemsignatur 05: 4.0.30319.36411
Problemsignatur 06: 598a4d8e
Problemsignatur 07: 8d2
Problemsignatur 08: 22
Problemsignatur 09: System.ArgumentException
Betriebsystemversion: 6.2.9200.
Gebietsschema-ID: 1031
Zusatzinformation 1: 5861
Zusatzinformation 2: 5861822e1919d7c014bbb064c64908b2
Zusatzinformation 3: dee3
Zusatzinformation 4: dee364078cacf21977cdd5ba40342305

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We got it working now, inheriting from iZooPlugin3. Not sure still what caused the issue though. The last change I made was to match the izooplugin3::textMask field to match exactly the product key entered. But as the zoo plugin doesn’t yet know which product key will be supplied I guess this should not cause a fatal crash?

If inheriting from iZooPlugin causes the issue, changing the V6 visual studio templates may be a good idea!


Hi @dgebreiter,

Thanks for the report and our apologies for the inconvenience. I’ve logged the issue.


– Dale

Hi @dgebreiter , @dale,

This crash could be the same i got here: Zoo - ProductKeyTextMask