Difficulty with expanding portion of design

[N4n45h1]

I'm looking for some direction to follow to modify an existing design. I am trying to thicken left and right walls in order to make the inner section narrower. However, none of my attempts have been successful. I am not looking for learning materials for CAD, but rather a solution to this specific problem. I am not experienced in CAD but simply need to solve this one problem in order to move forward.

[blair]

This appears to be done in Autodesk Fusion. You should be able to select the inside side/face and use the "Push/Pull tool to thicken the desired face.

[N4n45h1]

Thanks for your reply.

I have tried to use the push/pull function and receive the error, "Modeling Error:  Failed to propagate the blend face graph."

I have also tried using the extrude function and receive a different error, "Modeling Error: Extrude operation failed."

Do you have any other ideas?

[blair]

I don't have Fusion on my system, you might try the Fusion forum: http://forums.autodesk.com/t5/Get-Help-with-Fusion-360/bd-p/123 It will be the Fusion 360 but should still work for you.