EDIT1: I am just going to disable arnold renderer completely and only run with octane v4 in H17.5 for a few days, just to see if there is some odd conflict happening. Geo nodes don't automatically get any arnold tags, but cameras do... I dont know. again file lost, not great.
I don't know what is going on, but my scene is so simple I barely do anything, I had a simple scene with a pighead and a box, using an octane materials with a few textures attached. I then decided to swap the big head for the test rubber toy, but as soon as I created it houdini instantly crashed, and now it will instantly crash when I try to reopen my project file which was saved as part of the crash the first time.
this is what I am getting in my console? Now I am not necessarily saying Octane is to blame here, but I have no idea where to start so... I don't know it just feels very trigger happy at the moment, octane 4 + H17.5.
<internal> Error(238): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(252): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(262): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(273): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(289): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(421): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(433): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(546): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(561): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(571): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(666): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(699): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(710): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(724): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(734): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(748): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(764): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(783): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(834): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(844): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(854): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(864): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(874): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(884): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(894): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(955): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(964): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1023): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1062): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1100): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1109): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1141): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1173): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1184): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1198): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1199): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1209): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1210): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1220): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1221): hidewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1247): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1355): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1376): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1397): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1418): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1427): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1525): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1572): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Error(1593): disablewhen: Conditional doesn't start with an opening curly brace.
<internal> Warning(1918): incorrect number of #s in 'os' for multiparm depth of 1
<internal> Warning(1927): incorrect number of #s in 'os' for multiparm depth of 1
<internal> Warning(1943): incorrect number of #s in 'os' for multiparm depth of 1
<internal> Warning(1955): incorrect number of #s in 'os' for multiparm depth of 1
<internal> Warning(1906): incorrect number of #s in 'os10' for multiparm depth of 1
<internal> Warning(1915): incorrect number of #s in '_os11' for multiparm depth of 1
<internal> Warning(1931): incorrect number of #s in '__os12' for multiparm depth of 1
<internal> Warning(1943): incorrect number of #s in '___os13' for multiparm depth of 1
47608: Fatal error: Segmentation fault