Hi, I have installed Maya 2019 with new arnold, updated nvidia driver and this shows.
// Error: [gpu] an error happened during GPU prepare : Unknown error (Details: Function "_rtVariableSet1i" caught exception: Assertion failed: "iter != m_map.end() : Non-existent property removed from graph", file: <internal>, line: 147) //
We're working on a fix for this issue. We were able to reproduce the error with one of our test scenes.
I am having a similar error:
// Error: [gpu] an error happened during GPU prepare : Unknown error (Details: Function "_rtVariableSet1i" caught exception: Assertion failed: "iter != m_map.end() : Non-existent property removed from graph", file: <internal>, line: 147) //
Arnold: 5.3.1.1
MtoA: 3.2.1.1