Dwarf Fortress Bug Tracker - Dwarf Fortress
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0008391Dwarf FortressDwarf Mode -- Environmentpublic2014-10-02 05:542018-04-16 18:00
normalminorhave not tried
0008391: Dwarves refuse to enter tiles which previously contained magma with TEMPERATURE: OFF
After disassembling save buildings with a little help of cave-in Idiscovered that some tiles became unreachable for pathfinding.

There are 2 places of such an anomaly
1. Hole in built floor over volcano(center of the map). Floor building cannot be designated because there is no materials.
2. a pile of blocks on the left side. Dwarfes cannot place it in stockpile and buildings cannot be built.
Save file: http://dffd.wimbli.com/file.php?id=9841 [^]
No tags attached.
has duplicate 0010826resolved Loci Miners will not dig multi-z cast obsidian. 
Issue History
2014-10-02 05:54CriperumNew Issue
2014-10-02 15:07LociNote Added: 0030508
2014-10-03 00:21CriperumNote Added: 0030511
2018-04-16 18:00LociAssigned To => Loci
2018-04-16 18:00LociStatusnew => acknowledged
2018-04-16 18:00LociSummaryTiles bacame unreachable after cave-in => Dwarves refuse to enter tiles which previously contained magma with TEMPERATURE: OFF
2018-07-10 07:27LociRelationship addedhas duplicate 0010826

2014-10-02 15:07   
It appears you have temperature calculations disabled. Any tile that ever contained lava (following your cave-in, in this instance) was set to a scaldingly-hot temperature. Dwarves will not enter those tiles until the temperature drops... which it will never do because you disabled temperature calculation.

Enabling temperature calculations and waiting a while allowed the dwarves to resume work on the volcano lid.
2014-10-03 00:21   
Oh. Never thought about it. Thanks. That worked.