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0008573Dwarf FortressCave-inspublic2014-11-22 06:422015-01-09 07:29
0008573: Unsupported land not dropping (yes, cave-ins are enabled)
I dug out a channel around about 2/3 of the map, channeled out an aquifer layer, and then tried to drop it. It didn't drop. I'm pretty sure there is nothing visible that could be supporting it. Clear gap all the way around and clear water all the way underneath.
* Load save
* Look
I had a big platform area above supported by trees an a stairway. That collapsed properly when every supporting thing was removed.

Save: http://dffd.wimbli.com/file.php?id=10110 [^]
Save Included, Save Needs Testing
duplicate of 0006949resolved Toady One Building in trees and then chopping down the tree leaves the building floating in the air 
related to 0008555resolved Toady One Pathfinding is not updated when trees are cut down 
Issue History
2014-11-22 06:42ptb_ptbNew Issue
2014-11-22 06:55smjjamesNote Added: 0031114
2014-11-22 06:57ptb_ptbNote Added: 0031115
2014-11-22 06:57smjjamesNote Edited: 0031114bug_revision_view_page.php?bugnote_id=0031114#r12376
2014-11-22 07:02ptb_ptbNote Edited: 0031115bug_revision_view_page.php?bugnote_id=0031115#r12378
2014-11-22 07:14ptb_ptbNote Edited: 0031115bug_revision_view_page.php?bugnote_id=0031115#r12379
2014-11-22 07:19ptb_ptbNote Added: 0031117
2014-11-22 07:22ptb_ptbNote Edited: 0031117bug_revision_view_page.php?bugnote_id=0031117#r12383
2014-11-22 07:33ptb_ptbNote Edited: 0031117bug_revision_view_page.php?bugnote_id=0031117#r12384
2014-12-27 09:30ptb_ptbNote Added: 0031510
2014-12-27 09:33lethosorAdditional Information Updatedbug_revision_view_page.php?rev_id=12607#r12607
2014-12-27 09:34lethosorTag Attached: Save Included
2014-12-27 09:34lethosorTag Attached: Save Needs Testing
2014-12-27 19:33FootkerchiefRelationship addedrelated to 0008555
2015-01-02 14:10ptb_ptbNote Added: 0031643
2015-01-09 06:54ptb_ptbNote Added: 0031817
2015-01-09 07:29FootkerchiefNote Added: 0031818
2015-01-09 07:29FootkerchiefRelationship addedduplicate of 0006949
2015-01-09 07:29FootkerchiefStatusnew => resolved
2015-01-09 07:29FootkerchiefResolutionopen => duplicate
2015-01-09 07:29FootkerchiefAssigned To => Footkerchief

2014-11-22 06:55   
(edited on: 2014-11-22 06:57)
Are you absolutely sure? Check above and below it for anything that might be connecting it.

Not sure if trees that have adjecant canopies would stop it from falling.

2014-11-22 06:57   
(edited on: 2014-11-22 07:14)
I<s>'m</s> was 99.8% sure. And I <s>have</s>did, several times.

Ah, there's an up stairway that I didn't think would provide support, but seeing as it hasn't collapsed, maybe it actually does. Whoops. I'll see if I can get rid of the bugger.

[EDIT] Update. It appears that the large lump of land has decided that it is actually unsupported and started dropping of its own accord. I had started work to break the upper stairs mentioned above, but not actually done so. It was possibly triggered into action when I built a small ramp and floor above where the upper stairs is (in preparation for dropping crap on it from above).

Incidentally, for those reading this interested in 'big splash' mechanics this again showed the 'chasm formation' behavior. Where giant lumps of rock dropped from above gain a one tile split through the middle.

2014-11-22 07:19   
(edited on: 2014-11-22 07:33)
Save file: http://dffd.wimbli.com/file.php?id=10110 [^]

You can probably get it to collapse by building a ramp, wall, and floor over the chasm on the left (one z up from ground level) above where the up stairs are.

[EDIT] All trees were cut down on left hand side of map.

(Posted wrong link)

2014-12-27 09:30   
I think this may be related to 0008555 Pathfinding not updated when trees cut down. If the land was supported by trees, but the trees were cut down, it may not be updating the 'supported/not supported' thing.
2015-01-02 14:10   
Also probably related to / duplicate of 0006949
2015-01-09 06:54   
I'm pretty sure this was 0006949 and is fixed.
2015-01-09 07:29   
Cool, thanks!