This happens occasionally; but suddenly in this project it is happening in several places: I type in 10’0”, hit Enter, and it changes to 9’12”.  Say whaaa?  According to my Units dialog, my scene accuracy should be 0’0.0000001192”, so how can this be a rounding error?

--3ds Max Design 2009 64bit, Direct3D 9, Win Vista Premium 64, 3ghz quadcore Xeon, Quadro FX1700--

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I commonly get 4’ 11 7/8” when typing in 5’ 0”.  Since you are working in decimals, and it’s only showing tenths, I wonder if it is rounding up, and the actual value is 9’ 11.96” or something like that.

3DS Max Design 2011 64-bit - Advantage Pack
Dell Precision T5500, Dual Six Core Xeon X5650 @ 2.67GHz, nVidia Quadro 5000, 24 GB RAM, Win 7 Enterprise 64-bit
Minneapolis, MN, USA

Interesting:
- if I type 10’ it changes to 9’12.0”
- if I then type 10’0.001” it stays as 10’0.001”
- and if I then type 10’ again, it changes to 10’0.001"…
!!!
Jeez; so much for accuracy!

--3ds Max Design 2009 64bit, Direct3D 9, Win Vista Premium 64, 3ghz quadcore Xeon, Quadro FX1700--

Try working with fractional dimensions. In 32nds everything is reported with 32nds...11/32, 12/32, 13/32, 14/32 etc… pretty annoying.

As odd as it is, I think Chris’s thought makes sense… it’s rounding at the decimal… but I don’t know why it’s not indicating that it’s rounded to the foot when it obviously did.  See if adjusting the decimal precision changes those displays to reveal more info.

Maybe your feet are bigger than mine. ;)

Maneswar Cheemalapati [FA]