topic Re: Assertion Failed - Rendering in CFD Forum

Assertion Failed - Rendering

Anonymous — Wed, 25 Oct 2017 15:01:24 GMT

Ran into a really weird one today. An assertion failed error. See below:

It seems to be referring to an absolute file path that includes a personal folder of someone called Jenkins? hahaha. I think someone made a programming mistake there.

This error occurred when viewing a model in Autodesk CFD 2018. The zoom function using the mousewheel stopped working, so I attempted to use the manual zoom tool and then the error immediately occurs.

Anyone at Autodesk who can help with this one?

Regards,

Matthew Gent

Re: Assertion Failed - Rendering

Amal.C — Fri, 27 Oct 2017 13:36:21 GMT

Hi Matt,

Nice joke 😄 😄 !

Does this error message happen for all the models you open in CFD 2018? Did you make sure to install Update 1 of CFD 2018?

What about your graphic card? Do you have the latest driver installed on your machine?

Thanks,

Amal

Re: Assertion Failed - Rendering

Anonymous — Mon, 30 Oct 2017 08:57:46 GMT

I have not! I've just seen it in my autodesk desktop app. I'll install that and see whether the issue occurs again.

Re: Assertion Failed - Rendering

Jon.Wilde — Mon, 30 Oct 2017 09:03:10 GMT

Check this out too.

In the meantime, I will go have a word with Jenkins...

Re: Assertion Failed - Rendering

Amal.C — Thu, 02 Nov 2017 14:06:02 GMT

Hi Matt,

It would be great if you can provide us with an update regarding this issue 🙂 were you able to avoid it after installing the latest update of CFD 2018?

Thanks,

Amal

Re: Assertion Failed - Rendering

Anonymous — Thu, 02 Nov 2017 14:12:49 GMT

Hi Amal. Unfortunately, I cannot install the service pack with my current license. My boss has to do that and he still hasn't got round to it. So I can't say whether this will work or not yet!

I know you support guys will be eager to tick this problem off the list! You may if you want. I can always re-open another if it doesn't work.

Re: Assertion Failed - Rendering

Jon.Wilde — Thu, 02 Nov 2017 18:29:35 GMT

Hi Matt,

Jenkins was wondering if you had a chance to apply those flags I shared above to the global settings 😉

Re: Assertion Failed - Rendering

Anonymous — Tue, 30 Jan 2018 22:25:28 GMT

I'm not sure if this was ever resolved, but I have had a very similar problem. In my case, the problem was linked to the fact that I had spherical geometry in my model. I had a Brass cube (hear sink), a flattened cube rectangle for a peltier module, and a hemisphere solid (steel) on the cold surface of the peltier. It gave me this "Assertion Error" written by this jerk Jenkins multiple times. When I remodeled a hexagonal nut to replace the dome: problem solved.

I have had this same problem with FUSION 360 as well.

I even retried my hemispherical system after a succesful run on the nut. Jenkins struck again.

Re: Assertion Failed - Rendering

jeffguida — Mon, 09 Apr 2018 07:02:25 GMT

I'm getting a similar error every time I try to run In-Canvas rendering. Strangely this only started AFTER I upgraded my machine to a top-line Nvidia P5000 system (and graphics drivers are up-to-date). Ironic.

Autodesk support please help! Error below and submitted several times.

Re: Assertion Failed - Rendering

Melissa_Wang23 — Wed, 07 Jan 2026 18:50:16 GMT

I get this similar message when trying to click on "select all" of the wall calculator.... although it's a guy named agent. I disenabled wall layers in the meshing process, would that have anything to do with it? Please help, it's rather urgent.