ID:1204156
 
(See the best response by LordAndrew.)
Problem description:
Does run-time errors affect with the server crashes? If so, what kind methods are used to fix this?

Best response
Run-time errors let you know that something has gone wrong in your game logic that the code wasn't able to process. Trying to access variables from something that doesn't exist, trying to perform an operation that makes no sense, etc. These can lead to crashes, but not always.

The best way to fix them is to read the error and track down the part of your code that caused it. If you enable debug mode for your project (#define DEBUG) then the run-time error will point to the exact file and line that the error occurred at.
Andrew is right. And you can also just look at the runtime error. It should say mob/verb/NameOfVerb() or mob/proc/NameofProcedure() and after that usr: ByondKey

Just do some research there and find the verb or proc or whatever the problem is. If you need help you can always post your run-times then I wouldn't mind walking you through it.