# I tried to start a vehicle construction using butter, but it was too slipery to ride in

**URL:** <https://discourse.cataclysmdda.org/t/i-tried-to-start-a-vehicle-construction-using-butter-but-it-was-too-slipery-to-ride-in/25876>\
**Category:** The Garage\
**Created:** [February 6, 2021, 1:22pm UTC](https://discourse.cataclysmdda.org/t/i-tried-to-start-a-vehicle-construction-using-butter-but-it-was-too-slipery-to-ride-in/25876 "2021-02-06T13:22:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ThinkSome](https://avatars.discourse-cdn.com/v4/letter/t/278dde/32.png) [@ThinkSome](https://discourse.cataclysmdda.org/u/ThinkSome)\
**Post date:** [February 6, 2021, 1:22pm UTC](https://discourse.cataclysmdda.org/t/i-tried-to-start-a-vehicle-construction-using-butter-but-it-was-too-slipery-to-ride-in/25876/1 "2021-02-06T13:22:44Z")

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DEBUG : item butter used by construction is not base item of any vehicle part!

FUNCTION : vpart\_id vpart\_from\_item(const itype\_id&)  
FILE : src/construction.cpp  
LINE : 1254

/s

(I told a NPC to start vehicle construction, and was crafting 2 jam&butter sandwiches when this happened).

Edit: it asks me for vehicle name, which I enter. Then the NPC immidiately re-starts the construction. There is no vehicle there.

If I interrupt the NPC at 98% complete of this restart, it results in no vehicle.

Edit2: If I start construction myself (not by blueprint) and then have NPC continue it, the same error happens.

Edit3: and the same error happens if I start construction, have NPC do 90% and then I finish it (telling the NPC to go do something else).