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The following settings are recommended up to CoCreate Modeling 16.5 and SolidWorks 2016.

OneSpace Designer – System

Components of an assembly should have names no longer than 16 characters.
System accuracy should be set prior to modelling.
Recommended values are 10-6 mm, 10-5 mm, 10-4 mm.
The smallest extent value (e.g. edge length) can be set under:
SystemSetting ->Advisor/Check Setting -> min Edge
All Advisor Checks (voids, nonmanifold, knife edge, min edge) should be active while modeling the part.
Complete body checks should be done frequently during design and prior to export to STEP.

OneSpace Designer - STEP Preprocessor

When invoking the STEP export choose as option target system e.g. (CATIA IBM) or CATIA (debis) or Pro/ENGINEER.
If, in case of an assembly export, the option Assemblystructur/Shared Parts is set ON, individual colors of instances cannot be exported.
If the target system cannot process assembly structure information or geometric transformation, then you should select NO to suppress this information.
Hybrid models must be exported with multiple products. You can also use the Structure Browser to make your selection. If you try to specify a part by clicking in a viewpart, you will select only faces or edges instead of the whole part.

STEP File

SolidWorks - STEP Postprocessor

To import a STEP file go to File -> Open… and select the file.
Click on Options and the Import Options dialog box appears. Under General options following can be selected:
Surface/solid entities: import surface and solid entities.
B-Rep mapping: import the model using boundary representation. If not selected, SolidWorks attempts to knit surfaces into solids.
Knit surfaces: imports as surfaces and tries to knit imported surfaces.
Do not knit: imports as surfaces without knitting them.
Free point/curve entities: imports free points and curve entities.
Import as sketches
Import as 3D curves
Import multiple bodies as parts: Imports a multibody part as an assembly document. The multiple bodies are imported as part documents contained in the assembly. With this option cleared the multibody part imports as a part document that contains multiple imported bodies.
Perform full entity check and repair errors: default is selected
Customize curve tolerance: needed tolerance for the import can be entered here.
Map configuration data (for STEP only): Imports STEP file configuration data plus geometric data. To import only the geometry this option must be left unchecked.
The other available options are not applicable for the STEP import.
Recommended options are to check Surface/solid entities, Try forming solids and Perform full entity check and repair errors.

SolidWorks – System

Import errors are indicated in the history tree. By mouse right click over the model and choosing What’s wrong?, a detailed information will be displayed.
Doing a Geometry check, the errors will be indicated in the model.

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