"object reference not set to an object" Orbital Re-engineering

[tiriss]

The main reason I'm posting this is if you run into the same problem, I have found a minor work around of this feature (not necessarily a bug) but while moving parts around on larger stations, I have gotten this error.  Here is a screenshot of the bug when you have an engineer moving parts in EVA.

The issue is that Senior Clampotron highlighted won't move anywhere.  There's no way to use the move tools, or placement tools to migrate it anywhere and throws the exception every time.  You cannot reroot a part or assembly in space (probably the underlying issue).  The work around I used was to detach the T crossbar assembly (with the 2 sub-systems) rotate the entire thing 180 degrees and reattach the large clampotron (which I was trying to move) and reattach to the main T column so it looks like this.  I was able to move the other clampotron to the miner/lander., it then looks like this.

You can see I moved the highlighted clampotron to the miner/lander.