get_pipeline_source Error

Against Build v0.2.0.ac9b6be, I’m getting an OgreWidget Error:
“get_pipeline_source Error: beginning of pipeline is not a pipeline source”

This pops up every time I try to move the main viewport. It can be closed, but reappears when I next try to move viewport.

Thank you for your report! Unfortunately, I’m having some trouble reproducing this problem.

By “move the viewport”, do you mean navigating in the viewport (i.e, pan, zoom, and rotate in the viewport), or docking the viewport panel in a different place?

Does this happen for you with a new document?

I’m working at getting you reproduction steps but it’s something obscure. I’ve seen it a couple times now so it’s not a one-off.
This morning I was writing up tutorial for internal use, and Sequoia was behaving flawlessly - darn!