AutoCAD 2013/2014 DWG Format

[#1]

I'm with problems with AutoCAD 2013. I have a student license. When I open some dwg archives and select some lines appear something very strange, not usual in other versions. See below:

Is it normal in AutoCAD 2013? Does anyone have a idea how I can deactivate it?

I'm with another problem too. I select a entire plant and move it. The dimension line is stretched between the old position and the new in the drawing. Does anyone heve this problem? How can I eliminate that?

Any suggestion will be useful. 

[#2 · Accepted solution]

Those icons are indicating that there are constraints applied to all of the objects associated with them.  You can run the DELCONSTRAINT command and eliminate them if you have no further use for them.  In the future, if you won't be using constraints at all, set the CCONSTRAINTFORM system variable to "1".

[#3]

Also, the dimensions which are associative, are updating based on the new positions of those objects.  I think you will find this very useful, in general, once you get used to it.  If you don't want this behavior, you should look into the different settings for DIMASSOC.

[#4]

_constraintinfer = 0

This is all you need do.

[#5]

Thanks! This command DELCONSTRAINT solve my problem... So simply!

[#6]

mmelechinsky is right about the CONSTRAINTINFER system variable.  That is what you should do to make sure you suppress this function in future drawings if that is your method and you have no use for constraints.  As this person indicated, set it to "0" to avoid applying constraints.