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NX >> I-DEAS NX Series

The following settings are recommended up to NX 11 and I-DEAS 12 NX Series.

NX – System

Delete blanked elements before preprocessing.
To transfer colors of assemblies the colors should be set and saved with the individual components, not the assembly.
Note that NX uses the radius of a "tolerance tube", other CAD Systems like CATIA V4 define "tolerance" as the distance between two points.
Select Analysis -> Examine Geometry -> all options -> all elements (up to NX2).
Select Analysis -> examine Geometry -> Set All Checks (up to NX8.5) The marked elements are likely to cause problems with data exchange, depending on the messages as explained below:
Severe errors:
data structures, consistency, face-face intersections, self-intersections
Might cause problems:
tiny, face smoothness, spikes/cuts, edge tolerances
Without negative influence on data exchange:
misaligned, sheet boundaries, edge smoothness

NX - STEP Preprocessor

Start the external STEP processor with File -> Export -> STEP214.
Select Data to Export and define the options:
Object Types: One or more of the options Solid, Product Data, Surface, and Wireframe (depending on model).
The default tolerance value in menu Advanced -> Parameters -> B-Spline Aprx. Tol. of 1.01*10-5 mm can cause to very large STEP files and should be reduced in such cases(recommended value: 10-3 mm).
Recommended is to use the default settings in menu Translation Control (Tolerant Modeling).
Special characters in the filename of the STEP file are not allowed. The model will not be exported.
Validation properties are supported.

STEP File

STEP files using either version (CD or DIS) can be imported.
The STEP filename including path should not exceed 41 Characters.
The STEP filename should not contain: equal sign (=), colon (:), semicolon (;), asterisk (*), question mark (?), quotation marks (""), or comma(,);
There must be no spaces in the STEP filename.
The extension *.step of the STEP files must be renamed to *.stp.

I-DEAS NX - STEP Postprocessor

Save reminder (Options/Preferences/Data Management/ Save reminder every) should be turned off since the translator stops for every alike message.
In Menu STEP Export Settings AP214 several options for the used units of functionality can be set.
A change of the default options is only necessary in case of unsuccessful results.
If the import was successful, you will get a confirmation message.
Two logfiles are generated (filename.ipr and stepoi.ipr):
filename.ipr includes the import settings
stepoi.ipr includes an import log
The log files are written in the same directory as the STEP file.

I-DEAS NX - System

A part is automatically generated from the filename on import.
If the part name duplicates an existing part name, the part is renamed "Duplicate Part Name X", where X is a sequential number (X=0 for the first duplicate).
On each import, a new part is created even if the parts are identical. Therefore, the part names must be different.
Shaded view gives hints about possible defects.
Use the Automatic Stitch-mechanism for information about open gaps and remaining free edges. It is found in Master Surfacing Module in Menu Surface Operators.
If free edges are found in solid models, the Automatic Stitch-mechanism can be applied to merge free edges by changing default accuracy. For surface models, the edges that build the contour of the model remain free edges.

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NX >> I-DEAS NX Series