IGES exportscaling

When I export to IGES 144 I got a pop-up with a scaling issue. Importing the file the same issue.
This does not happens the first time after opening Rhino.

Software information

Software versions
Rhinoceros version: 5.0 WIP (5A766w)
IronPython version: 5.1.2015.131
Language: de (MacOS default)
OS X version: Version 10.9.5 (Build 13F1066)


Third party kernel extensions
com.3dconnexion.driver (10.2.1)

Hardware information

Computer hardware
Hardware model: iMac13,1
Processor: Intel Core i7-3770S CPU @ 3.10GHz
Memory: 16 GB
Architecture: Intel 64 bit

Video hardware
Graphics: NVIDIA GeForce GT 650M 512 MB
Memory: 512 MB
Screen size: 1920 x 1080, 1280 x 800
Displays: iMac (103dpi 1x), Cintiq 12WX (125dpi 1x)

USB devices
Љ: DYMO LabelManager PnP
Canon: CanoScan
3Dconnexion: SpaceNavigator
Western Digital : External HDD
HLDS Inc.: Super Multi DVD Rewriter
Apple Inc.: FaceTime HD Camera (Built-in)
Tablet: DTZ-1200W
Vimicro Co.,ltd: Vimicro USB2.0 UVC PC Camera
Apple Inc.: Bluetooth USB Host Controller

Bluetooth devices
Apple: Apple Wireless Keyboard

OpenGL information

OpenGL software
OpenGL version: 2.1 NVIDIA-8.26.28 310.40.55b01
Render version: 2.1
Shading language: 1.20
Maximum texture size: 16384 x 16384
Z-buffer depth: 24 Bit
Maximum viewport size: 16384 x 16384

Implementation settings
Use texture compression: No

Appearance settings
Antialiasing: 2x
Mip map filtering: Nichts
Anisotropic filtering: Nichts

This bug should be fixed in the next release. It was a combo of setting the IGES units initially to the Rhino document units on initialization of the plugin and settings not being written to the disk. You’re only supposed to get that dialog if the units in the detailed dialog differ from the units of the current rhino model being exported.

Thanks for reporting it.