3D sketch failure - how to figure out where the failure is??

[dcook87725927]

I have a 3d Sketch controlling a frame generator assembly. I needed to change a 2D sketch that was controlling the 3d sketch via "Include geometry"

However, When I changed the 2D sketch the entire 3D sketch turned pink and the sketch said there were errors in the constraints. Problem is I cannot find where the problem is...

I have narrowed it down to the lines circled in the screenshot (because when I delete them the problem goes away). But I have a lot depending on the frame members designated by those lines - So I dont want to delete them. I think the problem is in the reference at the point where the lines meet - but when I try to delete that reference it throws an error.


Frustrating!!

Any suggestions? Screenshot and .ipt are attached.

[dcook87725927]

The error returned when I try to "Break Link" Between the bottom projected points is as follows:


Problems occurred while solving sketch. Use Edit Sketch to change sketch geometry or constraints.
Sketch has constraints that could not be solved. Try deleting some constraints.


I cannot hit "Accept." "Cancel" Is the only option.