TypeError: Cannot read property '3' of null

[GoogleCodeExporter]

What input will reproduce the problem?

scn NVDLC03MadScienceKnockbackSCRIPT

; Created custom knockback script for Dr. Mobius' Glove crit attack.
; ETB 3/23/11


Begin ScriptEffectStart

Ref Myself

If ( Myself.HasPerk Stonewall != 1 && Self.HasPerk wwStyleMountainStance != 1 )
    Set Myself to GetSelf;
    Player.PushActorAway Myself 8;
    Myself.SetAV Aggression 3;                                      ; Sets enemy to a Frenzied state (causing him to attack anyone friend or foe).
Else
    ShowMessage StonewallMessage
EndIf

End

What is the expected output? What do you see instead?

TypeError: Cannot read property '3' of null
Please report this error.

What internet browser and operating system are you using?

Chrome, Windows 7

Please provide any additional information below.

Other scripts I've tested have been fine - it seems to be the DLC Knockdown 
scripts that are causing problems.

Original issue reported on code.google.com by [email protected] on 5 Dec 2014 at 11:33

[GoogleCodeExporter]

I see what the problem with my script is - just not sure that the validator 
shouldn't be identifying it :P

Original comment by [email protected] on 5 Dec 2014 at 11:39