Error: String stack not popped enough in script exec - DUPLICATE

I'm running into the following error every now and then

"String stack not popped enough in script exec"

I've checked the script and its a simple add to an arrayobject with a couple of strings.

I can run the same script numerious times, but 1 out of 20 errors with that error.

I want to know what could cause the error, yes I know what it says, but what causes it?

AddEvent("doCmdStartScene", "1000,"Dummy","","Sector_T3D","392.803009033203 194.682006835938 665.031005859375 0 0 0 1","0",1");


function AddEvent(%eventID, %args)
{
   echo("Adding " SPC %eventID SPC "]" @ %args @ "[");
   $EventMgr.push_back(%eventID,%args);
}

The echo shows the following which is correct

Adding  doCmdStartScene ]1000,"Dummy","","Sector_T3D","392.803009033203 194.682006835938 665.031005859375 0 0 0 1","0",1[

With trace on, I see it enter AddEvent, but then error out. Remember this is like 1 out of 20 I get the error, the rest of the time it works. Thats why this is so confusing.

Any ideas?

Thanks