id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
26	"Aven says ""Bug in Program"" on certain 3d files"	Mike	Olly Betts	"Windows version of Aven 1.2.1 flags ""Assertion Failed! ... file gfxcore.cc line 2233 Expression z<=z_ext"" on certain .3d files. Pressing ""Ignore"" button, aven continue and produces a result but I haven't checked if it's correct! ""Abort"" goes to ""Bug in program detected. Please report this to the authors"".

On Ubuntu, the same 3d file also fails. There is no assertion failiure dialog box and it goes straight to the ""Bug in program..."" dialog.

Graham Mullan referred to the Asertion Failure on the Survex list but doesn't seem to have raised a ticket. I have not seen the problem on any of my ""real"" survey files but found it with the file cave.3d buried in the Therion samples/survex directory. I have reduced this to a single simple file, attached, which reproduces the problem. It's hard to say how serious this is."	defect	closed	minor	1.2.2	aven	1.2.1	fixed