From: John Stone (
Date: Fri Dec 13 2019 - 00:53:31 CST

  If you have a fully up-to-date video driver, you might want to try a
newer test build. In my testing here I've finally been able to disable
a piece of workaround code in the OptiX renderer that leaked a bit of
memory to avoid a potential crash. I've tested the new code with driver
440.44 with good results so far. Assuming continued testing goes well
tomorrow, I would say that a new build would likely resolve this issue
for you.

  John Stone

On Thu, Dec 05, 2019 at 05:56:54PM +0100, Bart Bruininks wrote:
> Heya,
> I have been rendering some movies as of late, and I keep running in to the
> following error after about 150 frames:
> ERROR) OptiXRenderer) ERROR: Unknown error (Details: Function "RTresult
> _rtContextLaunch2D(RTcontext, unsigned int, RTsize, RTsize)" caught
> exception: Assertion failed: "!m_enteredFromAPI : Memory manager already
> entered from API", file: <internal>, line: 1099) (OptiXRenderer.C:2597
> I am running vmd 1.9.4a31.
> It results in the rendering to continue in the moviemaker, but no actual
> files are written (an empty file does get created).
> Cheers,
> Bart

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