Your sketches are not constrained.
I recommend you start here.
Then I would use the technique presented here (or something very similar)
You should also install Service Pack 1.1
You were missing so many dimensions it is nearly impossible to figure out your design intent, but - check the Flat Pattern in this file.
In my last message I don't think that the file got uploaded. This is the exact piece that I need. I know there are no dimensions, to get the piece I needed I had to delete the constraints. It is the correct size however.
....to get the piece I needed I had to delete the constraints.
I don't understand that workflow.
I think you will need to explain the design intent.
Looking at your model I personally have no confidence that I know what you are trying to achieve or that you are using the correct technique. That spline looks like a bit of a mess to me. Is the surface really a revolution? What is the purpose of the empty 3D sketch? Why isn't the circle in Sketch2 at the origin?
If this must be a Revolve rather than an Extrude - you will not be able to Flatten in Inventor.
You will need some 3rd party software (I have heard Autopol, but have no experience with it).
I suspect that spline could be replaced with a line and arc or multiple arcs and be well within whatever manufacturing tolerance you have.
Without doing the revolve I cannot get the desired shape, unless you know another way to go about it. I am "attempting" to draw a column for a water tower. This is the piece that meets the base of the container. I am wanting to create a template to cut the curved piece accurately, but I seem to be failing miserably. I have redrawn the piece keeping all the constraints; I have also included a screen shot of the original CAD drawing. Hopefully I am not a lost cause and maybe you can help point me in a better direction.
The blue geometry is a line, not a spline. (and it appears that it should be at centerline of the column which yours is not)
The yellow geometry is most likely an arc, not a spline (you can check in AutoCAD with the List command).
The column appears that it should be at an angle.
The file I attached earlier showed how to make a template that can be wrapped around the column to show where to cut.
It appears to me that you are concentrating on the wrong part of the problem.
If I understand the problem - this one should be pretty easy to figure out.
Can you attach the dwg here?
Are you not after something like this as a template that can be wrapped around the column?
If so, the template could be "ripped" at the short side (as I did) or the long side
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