Offset curve not anchored

[tmccar]

In Inventor 2012, if I offset a curve and then constrain the offset to the correct dimension, it always moves the original curve and the offset curve becomes the "fixed" curve. How can I change this?

[SBix26]

Constrain the original curve so it can't move.  If this isn't a helpful suggestion, then please post your file and more information about what you're trying to accomplish.

[JDMather]

Attach the file here.

[tmccar]

I have attached the file, thanks

[SBix26]

Need parts, too.

[JDMather]

Almost 300 posts going back 5 years and still not aware that an iam file is nothing more than a list of hyperlinks and a record of constraints?

Someone hasn't been paying attention.
I don't even see any reference to assembly environment in the original problem description.

[tmccar]

All parts attached this time

[MingweiGao]

From your skecth, the original sketch in the center is not constrained. Can you constrain the original curves firstly and then do the offset or change the offset dimesion?

[tmccar]

OK, I had deleted the construction line I was using to constrain the shape because the loop wouldn't close. That is probably why it's no longer constrained.