Hi,
The 3ds Max iterative mode probably shouldn't be used with Corona, and that may be triggering those errors. Have you tried re-installing 3ds Max and Corona?
Not keen on re-installing 3dstudio max and all of its plugins, for this one file that's bugging out, but still functional in iteration mode.
That error is quite rare, and we are not exactly sure what is causing it. Are you maybe using some remote desktop app like Team Viewer?
We use teamviewer to connect to remote renderstation and turn on corona distributed rendering, BB-server & manager - That's it.
Generally it is connected with the framework we are using to draw the Corona VFB, so the ultimate solution may be using a different framework for this (which we do want to do at some point).
Ok, if it happens again i'll try and see if anything special happens to trigger it. Not sure...