dimension "copyright"

So im having this problem with a dimension lock or something... i got this drawing that i have to edit and complete deviations but keep the dimensions the same... every time i move or try edit the dimension it loses all its properties.. could anyone explain the reason for this and how i can "unlock" the setting and how do i perform this "lock"... below it is... thanks

dimension lock.dwg

I can just tell you that I see the same thing that you do. It looks like if you highlight one of the dimensions if doesn't have a dimstyle assigned, and when I pull at it it goes back to Standard dimstyle.

I have no idea why though. From the top of my head I could guess that whoever did this drawing altered the Standard dimstyle instead of creating their own... but that is just a guess.

When I opened this drawing I got a message that the drawing wasn't made in AutoCAD. That is probably the problem, where did this originate? I do see the white dims going to different colors but that is because of the layers each dim resides on. Move them to one layer, run a purge and audit (on a copy of the drawing) and make sure dimassoc is set to 1. HTH

I would agree with both of the statements above. It wasn't drawn in an Autodesk product and the Dimstyle has been altered. Whether it is the default in the other program or an altered one with the same name.