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0002075Dwarf FortressPathfindingpublic2010-05-26 17:302015-01-16 05:16
normalminorhave not tried
XPS M1730 LaptopWindows Vista Home PremiumSP2
0002075: Cannot build up/down or up stairs from above if there is a web on ground below
I'm almost certain I've been able to build an up/down stair from above into the caverns below.

Now I'm getting the message "...cancels Construct Building: Could not find path."

The only thing I can conclude is that the square I'm attempting to build on has a spider web in it.

The builders get the block, get on the up/down stairs above and begin building. Then I get the suspend cancel/suspend message.

When I cancel the building site, the blocks fall to the level below.
As another issue, those blocks are now marked as available to build with on that level, even though they aren't reachable and construction will never begin.
Hard to find the exact conditions to reproduce. I can upload a save if needed.
http://i881.photobucket.com/albums/ac11/Mondoshawan/webblocker.jpg [^]
parent of 0011186new  Can't build a stairway on the below level while a boulder is blocking site 
Not all the children of this issue are yet resolved or closed.
Issue History
2010-05-26 17:30DwarfuNew Issue
2010-05-26 21:25DwarfuNote Added: 0007362
2010-05-26 21:26DwarfuNote Edited: 0007362bug_revision_view_page.php?bugnote_id=0007362#r2760
2010-05-26 21:38QuietustNote Added: 0007363
2010-05-26 22:42DwarfuNote Added: 0007367
2010-05-27 00:11FootkerchiefTag Attached: Intentional?
2010-05-29 22:47Khym ChanurIssue Monitored: Khym Chanur
2010-07-12 12:03FootkerchiefTag RenamedIntentional? => Intentional/Expected?
2015-01-16 05:16ptb_ptbNote Added: 0031953
2019-12-11 13:52LociRelationship addedparent of 0011186

2010-05-26 21:25   
(edited on: 2010-05-26 21:26)
I forgot to check the errorlog.txt file - it seems to support that the dwarf was trying to get rid of (clean) the spider web:

path fail: dwarf,Construct Building,60,72,30 -> 60,72,29: Id (No.)1264:Path Goal Clean Building Site:Station Mill Building at 65,76,38

Edit: I had to change the hash symbol because Mantis converts it to a bug report link.

2010-05-26 21:38   
This sounds normal - the web is in the way, and your mason cannot reach the tile in order to clear it of objects because you're building from above.
2010-05-26 22:42   
I get that...but webs are destroyed by walking over them...I would think that dropping a giant carved rock block on them would destroy them as well...

I guess the question is whether or not it is intended for a spider web to block a construction.
2015-01-16 05:16   
The question is still open. Although I'm inclined to expect the answer as 'yes'.

You get the same problem if items are on the ground, or if an 'up ramp' is where you want to build the stairs.