I use plane mates to locate a sub-assembly in a larger assembly. The locating plane orientation is controled by a sketch including a line at an angle relative to one of the principal planes, the angle parameter is controled by an equation. The locating plane is defined as normal to the line in the sketch. Sometimes the locating plane doesn't follow the angle parameter changes. I tried Ctrl-Q with no success. Does anyone else have a similar problem. Thanks.