ISOLATE SELECTED OBJECTS DOESN'T WORK

[hutu.rebel968919]

As the title says, isolate objects doesn't work...properly. Previously, I selected objects and THEN right click--->isolate selected objects and boom, objects are isolated.
Now, when I select my objects, and press isolate selected, Civil just UNSELECTS them and i can see in command line: select objects you want to isolate. (I already did!!!)
It frustrates me, I need that command all the time.
Anyone know a solution?

[Tom Beauford]

Make sure PICKFIRST (System Variable) is set to 1.
http://help.autodesk.com/view/ACD/20...2-78C626A60844

[CCarleton]

As a tangent this is why I run a variable reactor routine because CAD has always enjoyed changing certain variables for whatever reason.