This is one for devs
tolua++ dbcall failed!: [string"–client\functional\engineWizard_delegates.lu…"]:1662:attempt to index a nil vlaue
I hope this is the correct place to be putting it! 
What did you do in order to get this? What are the steps to reproduce this?
I got this crash by doing the scenario “Millenium Crash”
I built an engine as normal, (I think it was a 2399CC Inline 4 Engine with a Turbo) and then I got to to the testing stage where it gives you all of the stats + objectives. I got all of the objectives except for the “Economy better than 0.781lb/(hph)” and the “Weight lower than 120kg”. After I thought I had put enough time into the engine I clicked on the arrow to lead to trim, presuming this would come up and tell me stats and how I scored on the scenario, but instead the game froze, so I tabbed out and saw this crash error, that came up about 8 times (so pressing ok on a crash dialogue and then another of the same message popping up), and thats how I got this crash. If you want any more info maybe on the spec of my computer or OS then just give me another reply
I have similar error when i start the game : Fatal error while loading init.lua: [string"–client\functional\TopBarDelegates_Engines…|…"]:17 attempt to index field ‘FactoryInfo’ (a nil value) Can you help me ? Thank you from now.
@kokosika: Probably some engine save file that got corrupted? 
Try if the game starts and runs normally if you remove the last engine you worked on (or the whole Engines folder) in Documents\My Games\Automation
If you last played a scenario before you got the issues, then try removing that save file here: My Games\Automation\Scenarios
I got:
Lua Error:
tolua++ dbcall failed!: [string “–SANDBOX_DATA\CCarCalculator_Suspension.lua…”]:282: attempt to index field ‘FrontSuspension’ (a nil value)
from trying to load a car previously built.
Falco: That is the saving bug, check out the workaround stickied here in the support forums.
I had the same
Lua Error:
tolua++ dbcall failed!: [string “–SANDBOX_DATA\CCarCalculator_Suspension.lua…”]:282: attempt to index field ‘FrontSuspension’ (a nil value)
You can CTRL+C on this to report it.
and heres a pic of what happened after i hit ok… 
[quote=“TheColoredCow”]I had the same
Lua Error:
tolua++ dbcall failed!: [string “–SANDBOX_DATA\CCarCalculator_Suspension.lua…”]:282: attempt to index field ‘FrontSuspension’ (a nil value)
You can CTRL+C on this to report it.
and heres a pic of what happened after i hit ok… 
[/quote]
Read Killrob’s response above about the saving issue, that worked for me. And I had the exact same error.