Appending Arrays

then your code is just wrong, point

SuperStrict

Global Functions :String[30]
Global NumFunctions:Int = 20
Functions = New String[NumFunctions] 

addfunction("test")
addfunction("gaga")
addfunction("i just did it wrong again!")
Delay 2000

End

Function AddFunction(FunctionName:String) 
		NumFunctions:+1
		Functions = Functions[..NumFunctions] 
		Functions[NumFunctions - 1] = FunctionName
		Print Functions[NumFunctions - 1]
End Function

works without any problems.
Most likely because you put the :string behind it thought it is no :string, its :string[] which is something elementally different (actually a different class! :Array)