From: Ed van den Enden
Subject: Re-order GROUP Autolisp problem
Date: 
Message-ID: <01bb8527$aa7602a0$0d4697c2@pc3>
GROUP PROBLEM


We have found a big problem in the AutoCAD R13 C4 and C4a. When you are
using the GROUP function in AutoCAD you will see it yourself. I'll try to
show you where it goes wrong. You'll just have to do same as I do:

Start a new and empty drawing. We draw 4 lines at our screen. Start the
GROUP command. Make an unnamed group out off the 4 entities on our screen.
With the HIGHLIGHT function (from the group dialog-box) you can see that a
group named *A1 has been made. Now push the RE-ORDER button. A new
dialog-box will be shown at our screen. Select the group *A1 at the top of
the dialog-box. Now we are going to fill in the 3 empty boxes at the bottom
of the dialog-box.

Remove from position (0 - 3):   0	--> 0 place in box
Replace at position (0 - 4)     :   1	--> 1 place in box
Number of objects (1 - 4)      :   1	--> 1 place in box

Push the RE-ORDER button, followed by the OK button. You'll see the other
dialog-box again. Select the group *A1 again at the top of the dialog-box.
Push the HIGHLIGHT button. Now you'll see that one line has been removed
from the group ----> VERY WRONG.

This is what has happened in the AutoCAD database: 

BEFORE re-order:

((340 . <Entity name: 2240a70>) (340 . <Entity name: 2240a80>) (340 .
<Entity name: 2240a90>) (340 . <Entity name: 2240a98>))

AFTER re-order:

((340 . <Entity name: 2240a70>) (340 . <Entity name: 2240a90>) (340 .
<Entity name: 2240a98>))

It's clear that the second entity has been removed from the database and
group *A1.
This mistake will appear at the following combinations, when we start all
over again:

Remove from position (0 - 3) : 	0	or	1	or	2
Replace at position (0 - 4)      : 	1	or	2	or	3
Number of objects (1 - 4)       :	1	or	1	or	1

I hope somebody will respond to this, 

Dave Wijdemans

Email:	········@IAEHV.nl