Help? Half my grasshopper definitions aren't showing up in rhino?

Greetings all grasshoppers,

I'm not sure why, but today, more than half of my definitions aren't not showing it's preview in rhino. The ones that are showing up are appearing in wireframe mode. My grasshopper is set to shaded preview and nothing is reading wrong in the other definitions. I've tried turning on the preview for all, but still, nothing happens. Although, when I baked one of them, it appeared in rhino.

Does anybody have a clue as to what I am doing wrong?

Someone please enlighten me!

Thanks,
Ra

Replies to This Discussion

Permalink Reply by Danny Boyes on May 28, 2010 at 6:11am

is there a reference to the conduit in the rhino command line?

Permalink Reply by Ra on May 28, 2010 at 6:20am

It says "Exception was thrown in ExecConduit(): Object reference not set to an instance of an object."

but Grasshopper isn't complaining.

Permalink Reply by Danny Boyes on May 28, 2010 at 6:34am

Your bug is because a component (or free floating parameter) somewhere is not playing ball and is trying to draw a null object. Rhino doesn't like to play mind-games, so whenever it's told to draw some geometry in the viewport it expects to get a valid piece of geometry to go along with that request. It doesn't result in an actual crash, because there are safe guards to catch it but the display is short-circuited at that point and any valid geometry that could have been drawn isn't anymore.

Solution:
If you find the parameter that contains nulls and switch the display off (or get rid of the nulls) this problem should go away.

I got this from the man in the know

Permalink Reply by Ra on May 28, 2010 at 7:22am

Ah. So does this mean that the objects it's trying to reference are faulty?

And to find the parameter that contains nulls, does that mean plugging a panel into each component to check where the null objects are coming from?

Display off meaning preview?

I tried disabling the preview of all the components except the final extrusions, but it's still not showing up.

Sorry, I'm horrible at speaking grasshopper!

Permalink Reply by Danny Boyes on May 28, 2010 at 7:35am

First step is to switch on fancy wire view as this could direct you at a glance to the problem area as the wire might be orange.

If this doesn't work than you could select half of your canvas and only display this half if its wrong then select half of this side and keeping going until you narrow it down you should find the culprit pretty quickly with this kind of binary search.

I you want you can post your file and I'll have a look as well

Permalink Reply by Ra on May 28, 2010 at 7:46am

Problem solved!

Thanks a lot, Danny!

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