VerificationException in Web Player (NGUI related) about hotween HOT 27 CLOSED

Hi bjordan.

That's weird: I just finished developing a game with Unity 4 and a lot of 
HOTween inside, and the webplayer works perfectly. Could you write me an 
example line of code that generates this error? And also on what platform 
you're running the player from?

Yes, I'll try to reproduce it in a sample project.

Unfortunately for me, HOTween works fine in my sample project. This must be 
specific to our code, not yours.

Sorry for the bug!

Good luck with your bug then ;)

I have the same issue for my webplayer. It seems that an HOTween that access to 
basics properties from Unity (transform.position for example) is working, but 
every time I'm trying to access to properties from my scripts, it causes this 
error.

Can you create a sample project that replicates this issue, so I can play with 
it and see what's happening?

Sure.

I'm getting this too. Only in the web player, and only when I try to tween the 
properties of an NGUI sprite, eg "alpha". Works fine on iOS and Android 
platforms (all with Unity 4.3.1f1).

Here's a snippet that fails:

UISprite popupScreen = GameObjects.Find("PopupScreen").GetComponent<UISprite>();
popupScreen.gameObject.SetActive(true);
popupScreen.alpha = 0;
HOTween.To(popupScreen, 0.25f, new TweenParms()
           .Prop("alpha", 0.5f)
           .Delay(0.1f)
           .Ease(EaseType.EaseInOutCubic)
           );

Looking through NGUI's code (which is licensed, so I don't think I can post it 
up here), UISprite inherits it's alpha property from UIWidget:
public override float alpha { /* standard looking getter/setter here */ }

That definition overrides this alpha property from UIRect:
public abstract float alpha { get; set; }

Found a simple enough workaround, although I don't know if it's really a fix or 
not as the workaround isn't needed on iOS/Android: If I mark the property in 
question as "sealed" then it runs and tweens without raising an exception:

public sealed override float alpha { /* Getter/setter removed */ }

Thanks for bumping up this thread, I tried to recreate the issue, but I wasn't 
able to reproduce it with an empty project, even if in my real project I don't 
have any big code using HOTween.
I'm gonna try "sealed", after reading some documentation about this keyword.

Oh btw, it was a bug with NGUI too (tweening alpha property).
The only problem I see here is that I need to change the NGUI code, which is 
not a good idea in general.

Anyway, thanks again !

Thanks for the additional information deeperbeige. I'll try to create a similar 
property structure as the NGUI one (since I don't have NGUI) and see if I can 
replicate and possibly solve this error on HOTween's side.

That's really appreciated Daniele ! 

Hey, I can't seem to replicate this issue. Could you try to build a small 
sample project that replicates it, using the free/trial edition of NGUI?

Sure, I'll see what I can do... I know how hard it is to investigate a problem 
you can't see for yourself.

The problem is that we need to share with you at least some NGUI code parts. I 
don't know about licences...
Maybe we should contact the guy behind NGUI.

I'm doing a bit of investigative trimming to see if I can narrow down what it 
is about that specific property that causes the trouble. Let's see where this 
leads...

I've just sent an example project over. Let me know if it doesn't arrive for 
any reason.

Got it thanks. Will check it out later

Solved by using HOTweenMicro

What's HOTweenMicro?

Check it out on HOTween's website (comes with an explanation text): 
http://www.holoville.com/hotween/download.html

Ok I see it, thanks !

Worked perfectly for me. Thank you, fantastic support!

Hello,
I got this exactly same bug on the PSM version (= Vita version) :
- Exception when tweening the alpha property of a NGUI object (sprite)
- Fixed if I mark the property as "sealed"

Unfortunatly, I have tried the HOTweenMicro and it does not fix anything.

Do you think there could be any other way to fix this without changing the NGUI 
code ?

Supersorry for the superlate reply: August was hell and I totally lost this 
post. I might have an idea on how to fix this without touching NGUI, but I 
don't have NGUI so I can't replicate it. Can you manage to replicate it with 
the free version of NGUI so you can send it to me? Or is it a specific PSM 
issue which doesn't happen in the editor?