MC crash

Posted by Poromenos on Fri 05 Sep 2003 11:40 PM — 10 posts, 23,372 views.

Poromenos Greece Fri 05 Sep 2003 11:40 PM #0


<aliases>
  <alias
   match="^sw[ ]+(\d)$"
   enabled="y"
   regexp="y"
   send_to="12"
   ignore_case="y"
   keep_evaluating="y"
   sequence="100"
  >
  <send>Dim wrlWorld
Dim varWorlds

varWorlds = GetWorldIdList
If (%1 - 1) &gt; UBound(varWorlds) Or (%1 - 1) &lt; LBound(varWorlds) Then
    Note &quot;This world number does not exist!&quot;
Else
    Set wrlWorld = GetWorldById(varWorlds(%1 - 1))
    World.PushCommand
    World.Disconnect
    wrlWorld.Connect
    wrlWorld.Activate
End If
</send>
  </alias>
</aliases>

This SOMETIMES crashes MC. The world number is valid, by the way.

Nick Gammon Australia Forum Administrator Sat 06 Sep 2003 07:17 AM #1

There is a known bug that new worlds (ones that are not yet saved) are not yet allocated an ID, and thus the GetWorldIdList will return blank for such worlds.

This means the getworldbyid will fail. I would add this test:


if wrlWorld is nothing then
   world.note "World has not been saved"
else
  ' blah blah
end if

Poromenos Greece Sat 06 Sep 2003 09:32 AM #2

No, there aren't new worlds there... I have 2 open worlds that have been saved, I switch between them about 4-5 times, and then, all of a sudden, it crashes...

Nick Gammon Australia Forum Administrator Sat 06 Sep 2003 10:24 AM #3

I would still put the test in.

Poromenos Greece Sat 06 Sep 2003 11:25 AM #4

I will put the test in, but why does it return null when it's not supposed to?

Nick Gammon Australia Forum Administrator Sun 07 Sep 2003 12:35 AM #5

I cannot explain that, but the spec for GetWorldByID says "In Vbscript use the test "is nothing" to see if the reference is to a valid world.".

Poromenos Greece Sun 07 Sep 2003 12:47 AM #6

Added it, still crashes...

Nick Gammon Australia Forum Administrator Sun 07 Sep 2003 11:41 PM #7

Don't know. It shouldn't, but ...

If you can give me steps to reliably reproduce it I will try to work out why.

Poromenos Greece Mon 08 Sep 2003 12:30 AM #8

Yes, add the alias and try it between two worlds lots of times :P That's what mine does... Crashes once in about 50 times...

Nick Gammon Australia Forum Administrator Tue 09 Sep 2003 10:34 PM #9

I tried it hundreds of times without a crash. Perhaps you have some script that runs on world activate or something like that, that is causing the crash.

You could try a couple of empty worlds, with that alias and nothing at all else, and see if it still happens. If not, I suggest you check elsewhere.