Printing large format drawings to PDF

[GastonWyatt]

I work in Autodesk AutoCAD and need to send a large format drawing to pdf, the final size of which is 25" X 257".  Whenever I try to add a custom sheet size the actual page size won't change if I set the height or width above 129".  I have the "Default Settings" set to "Oversized Pages" which states printing over 200" but the custom size still won't change.  What am I doing wrong?

[barbara_a]

The 257 inch side exceeds Acrobat's 200 inch maximum page size. 

[GastonWyatt]

I did see that was the standard limit but when I dug into the Printing Preferences there was an option under "Default Settings" called "Oversized Pages" with this description:

"Use these settings to create Adobe PDF documents suitable for reliable viewing and printing of engineering drawings larger than 200 x 200 inches. Created PDF documents can be opened with Acrobat and Adobe Reader 7.0 and later."

That really makes it sound like newer PDF versions should allow larger dimensions.