Unity 3.1 Webplayer: access method failed

Question

Hi all,

I'm running a C# script in Unity 3.1.0f4, connecting to a remote server. The web-player build run from a browser generates the following error message -

MethodAccessException: Attempt to access a private/protected method failed.

at System.Security.SecurityManager.ThrowException (System.Exception ex) [0x00000] in <filename unknown>:0 at [Some constructor in my code]

The code looks like this:

Socket.Connect(hostname, port); //works
NetworkStream netStream = Socket.GetStream();//works
BufferedStream bStream = new BufferedStream(netStream);//seems to fail

When I, however, start the same project in the Editor, (with platform switched to web player, of course) it works without problems. It only occurs using the browser-plugin.

Even if I replace the NetworkStream with a MemoryStream, it fails when constructing the BufferedStream:

Socket.Connect(hostname, port); //works
NetworkStream netStream = Socket.GetStream();//works
MemoryStream test = new MemoryStream();//works as well
BufferedStream bStream = new BufferedStream(test);// also fails

As far as I could read from the documentation, both classes MemoryStream and BufferedStream are fully supported by the web player. NetworkStream is accessible as well, just the close(timeout) method is not - which I'm not using anyway.

Thanks for all hints :)

Answer 1

Hi,

Don't know if you still need help. Today we also had a MethodAccessException in our logs. It only occured on a Windows Vista PC, on all PCs with Windows 7 it just worked fine.

In the end it was a Hashtable deserialization that was made in the web player. It turns out that the Hashtable deserialization constructor

Hashtable(System.Runtime.Serialization.SerializationInfo > info, > System.Runtime.Serialization.StreamingContext > context)

is protected, so it can't be called during deserialization.

Our workaround was to just derive our own class from the Hashtable:

 [Serializable]

  public class SerializableHashtable : Hashtable

      public SerializableHashtable()

      public SerializableHashtable(SerializationInfo info, StreamingContext context)

          : base(info, context)

Strange behaviour, but it works for now.

Unity 3.1 Webplayer: access method failed

1 Reply

Your answer

Follow this Question

Related Questions