Got stuck withdrawing steel bars. Inventory was full of them, but it was waiting at the dispenser for more bars.
Log file's too big to upload, but the issue is probably in here:
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 17, nOre: 18)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 18, nOre: 19)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 19, nOre: 20)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 20, nOre: 21)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 21, nOre: 22)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 22, nOre: 23)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 23, nOre: 24)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 24, nOre: 25)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 25, nOre: 26)
00:56:30 DEBUG    [ItemEvent] 1 Iron ore removed
00:56:30 INFO    We have removed 1 Ore from our inventory (oOre: 26, nOre: 27)
00:56:30 INFO    Empty Coal Bag
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 DEBUG    [ItemEvent] 1 Coal added
00:56:33 DEBUG    ITEM ADDED: Coal
00:56:33 INFO    Putting Stuff
00:56:33 INFO    Put-ore-on
00:56:33 INFO    ===Put-ore-on good
00:56:34 INFO    ===Successfully Waited to be near belt
00:56:34 INFO    Belt success
00:56:34 INFO    Varbit for bars has changed new value: 26 old value: 0
00:56:34 INFO    Set ores to 1
00:56:34 INFO    Varbit Change Event: (id: 949, old: 81, new: 55)
00:56:34 INFO    Varbit has changed for coal (oCoal: 109, nCoal: 83, oVarbit: 81, nVarbit: 55)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 83, nCoal: 84)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 84, nCoal: 85)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 85, nCoal: 86)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 86, nCoal: 87)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 87, nCoal: 88)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 88, nCoal: 89)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 89, nCoal: 90)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 90, nCoal: 91)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 91, nCoal: 92)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 DEBUG    Bars Cooled validator, Current Ore Dispenser State: 1
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 92, nCoal: 93)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    Waiting For Bars
00:56:35 INFO    Walk To Dispenser
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 93, nCoal: 94)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 94, nCoal: 95)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 95, nCoal: 96)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 96, nCoal: 97)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 97, nCoal: 98)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 98, nCoal: 99)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 99, nCoal: 100)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 100, nCoal: 101)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 101, nCoal: 102)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 102, nCoal: 103)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 103, nCoal: 104)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 104, nCoal: 105)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 105, nCoal: 106)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 106, nCoal: 107)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 107, nCoal: 108)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 108, nCoal: 109)
00:56:35 DEBUG    [ItemEvent] 1 Coal removed
00:56:35 INFO    We have removed 1 Coal from our inventory (oCoal: 109, nCoal: 110)
00:56:36 DEBUG    Bars Cooled validator, Current Ore Dispenser State: 2
00:56:36 INFO    Opening Dispenser
00:56:37 INFO    Varbit Change Event: (id: 949, old: 55, new: 82)
00:56:41 DEBUG    Bars Cooled validator, Current Ore Dispenser State: 3
00:56:41 INFO    Taking Bars
00:56:42 DEBUG    Bars Cooled validator, Current Ore Dispenser State: 3
00:56:42 DEBUG    TakeBars Shouldn't be running right now!?
00:56:42 DEBUG    Bars Cooled validator, Current Ore Dispenser State: 3
00:56:42 DEBUG    TakeBars Shouldn't be running right now!?
00:56:42 INFO    Varbit for bars has changed new value: 0 old value: 26
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 INFO    Waiting For Bars
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 INFO    Walk To Dispenser
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:42 DEBUG    [ItemEvent] 1 Steel bar added
00:56:42 DEBUG    ITEM ADDED: Steel bar
00:56:43 INFO    Waiting For Bars
00:56:43 INFO    Walk To Dispenser
00:56:43 INFO    Waiting For Bars
00:56:43 INFO    Walk To Dispenser
00:56:43 INFO    Waiting For Bars
00:56:43 INFO    Walk To Dispenser
00:56:44 INFO    Waiting For Bars
After this point it' just those 2 lines repeated until I manually stopped the bot.
 
Happened again, this time 12 minutes in so I can upload the log.