EXTractoR crash on inconsistent EXR sequences

[bryab]

EXTractoR crashes when dealing with EXR sequences where the channels are not consistent across all images.

For example, make a sequence of 20 images, where the first 10 images contain channels for a layer called "LayerA".

For the next 10, remove that layer from the EXR files.

Import the entire sequence, frames 1-20.

EXTractoR will let you extract LayerA. Scrub to frame 11, and AE will crash.

I think in this case, perhaps either empty frames should be displayed, an error message, or color bars, making this appear like "missing footage" does in AE by default.

EXTractoR version: v1.9 - Apr 2 2015
Platform: Mac OS 10.11.6
AE Version: 15.1.1