Error while running event pipelayer::on_marked_for_deconstruction(ID 20)
pipelayer/lualib/BaseEditor/BaseEditor.lua:699: attempt to index local 'bpproxy_entity' (a nil value)
stack traceback:
pipelayer/lualib/BaseEditor/BaseEditor.lua:699: in function 'create_deconstruction_proxy'
pipelayer/lualib/BaseEditor/BaseEditor.lua:855: in function 'on_marked_for_deconstruction'
pipelayer/control.lua:35: in function <pipelayer/control.lua:35>

This should be fixed in 0.3.2. Did you get this to happen by dropping items with Z while in the editor view?

Nop, I think I got it by trying to remove an underground connection from whith a red blueprint from the underground

It is not fixed, it happens when you select an excessively extense area of underground pipes with a red blueprint

Same error message

I can't reproduce the problem. Can you post a saved game?