My game crashes to main menu on rightclick with tool.
Also the tools don't seem to be properly localized in english.
2068.264 Error MainLoop.cpp:1468: Exception at tick 36157413: The mod Greeble (0.0.1) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event greeble::on_player_reverse_selected_area (ID 196)
greeble/pattern_gen/importer.lua:228: attempt to get length of field '?' (a nil value)
stack traceback:
greeble/pattern_gen/importer.lua:228: in function 'importBlueprint'
greeble/pattern_gen/run.lua:110: in function 'testRun'
greeble/control.lua:78: in function <greeble/control.lua:71>

Will fix the error in next update, it's caused by empty selection area. Please try to get the tool, LMB select the pattern first and then RMB select the area to fill (should not be empty)

Also please make sure the pattern is rectangular and does not have holes in it. It will be patched later for making sparse patterns but for now the assumption is that the input sample is a completely filled rect with no skips