From: Bart Bruininks (
Date: Thu Dec 05 2019 - 10:56:54 CST


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).