SW2010.... I am inserting blocks into an assembly and giving them relations to each other, most are coincident, with a few colinear and tangent, there are only 10 blocks total. I was going along fine bringing each block into the assembly and putting them together. I grabbed each part to make sure I was getting the freedom I wanted as I attached each part. Then it happened, I grabbed a line to move a part and when i let go all my relations turned yellow and the whole assembly froze solid. No matter what part I grab and try to move, the same thing happens, stepping back of course each time it happens.