Strange scripted animation problem

I have a fairly simple setup with two prims with animations in them, the script in the master prim sends a linked message to the slave prim when the animation is changed to fire off the same animation for the avatar on the slave prim as on the master. This all works fine, both avatars are playing the same animation in sync. The problem occurs when the avatar on the slave prim stands up, that avatar continues to be controlled by the script in the slave prim and continues to be animated in sync with the avatar on the master prim. The really weird thing is that this linkage has survived relogs and even from one day to the next. Any help with this owuld be greatly appreciated.

When standing up, requested animate permissions don't get revoked (and despite what the wiki says, calling llRequestPermissions with the value of 0 doesn't release them either) until you request permissions for another avie (or you reset the script).

You need to either check llAvatarOnSitTarget for a non NULL_KEY (best and easiest way), or set/clear a flag in the changed event that indicates whether someone is sitting on either prim or not and check before playing an animation.

Found a workaround

If there is no one sitting on it I reset the slave script. Works but kind of like hitting things with a 2 by 4.

This should work fine .

if ( (NULL_KEY != llAvatarOnSitTarget()) && 
     (llGetPermissions() & PERMISSION_TRIGGER_ANIMATION) )
  llPlayAnimation(...);

You'd think so but my code looked very much like that and it did not work, I figure just an undocumented feature of SL.

Thanks for your help.

You need to clear the animation and key being used by the slave prim when they stand up.
I'll assume you hold the key of the slaved sitter in a variable called sitter and the name of the current animation in animation

    changed(integer change) 
    { 
        // something changed 
        if (change & CHANGED_LINK) 
        { 
            // and it was a link change 
            key id = llAvatarOnSitTarget();
            if (id != NULL_KEY && sitter == NULL_KEY) 
            { 
                sitter = id; // store sitting avatar's key 
                llRequestPermissions(sitter, PERMISSION_TRIGGER_ANIMATION ); 
            } 
            else if( sitter != NULL_KEY ) 
            { 
                // if the avatar has gotten up 
                llStopAnimation(animation); 
                sitter = NULL_KEY;
            } 
        } 
    }