Epson 3880 not printing correct size

[JohnBrew]

Under user defined paper size I have entered 17" x 32" to print an image designated 16" x 29". The printer will only print the image 12" wide. I have tried this twice with the same result. It prints 17" x 22" paper just fine. I have checked and double-checked my image size and paper size. Would appreciate any ideas on what is happening.
Thanks for all replies.

[redriverpaper]

Verify that you have 17" as your width and 32" as the height.  If you're on a Mac, the margin definition must be no less than 0.2" on all four sides.  Any smaller and weird things happen, sort of like you described.

[JohnBrew]

Thanks for your response. As I said all measurements were double checked. However, I will try to print again at 15" width and see if that works. BTW, I have printed many panos at 16" with no problems.