Atomizer/docs/05_API_REFERENCE/system_configuration.md

System Configuration

Critical: These are the ONLY paths and environments to be used unless explicitly reconfigured by the user.

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Python Environment

Environment Name: atomizer

Path: c:/Users/antoi/anaconda3/envs/atomizer/python.exe

Usage: ALL Python scripts and commands MUST use this environment.

Examples:

# Correct
"c:/Users/antoi/anaconda3/envs/atomizer/python.exe" script.py

# WRONG - Never use test_env
"c:/Users/antoi/anaconda3/envs/test_env/python.exe" script.py

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NX/Simcenter Installation

Active Installation: NX 2412

Base Path: C:\Program Files\Siemens\NX2412

Key Directories:

• NX Binaries: C:\Program Files\Siemens\NX2412\NXBIN
• Material Library: C:\Program Files\Siemens\NX2412\UGII\materials
• Python Stubs: C:\Program Files\Siemens\NX2412\ugopen\pythonStubs

Critical Files:

• run_journal.exe: C:\Program Files\Siemens\NX2412\NXBIN\run_journal.exe
• Material Library: C:\Program Files\Siemens\NX2412\UGII\materials\physicalmateriallibrary.xml

PROHIBITED Paths:

• ❌ C:\Program Files\Siemens\Simcenter3D_2412 - DO NOT USE
• ❌ Any path containing "Simcenter3D" - DO NOT USE

Reason: NX2412 is the primary CAD/CAE environment. Simcenter3D_2412 is a separate installation and should not be accessed unless explicitly configured by the user.

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NX Journal Execution

Command Template:

"C:/Program Files/Siemens/NX2412/NXBIN/run_journal.exe" <journal_script.py> -args <arg1> <arg2>

Example:

"C:/Program Files/Siemens/NX2412/NXBIN/run_journal.exe" "optimization_engine/import_expressions.py" -args "studies/beam/model/Beam.prt" "studies/beam/model/Beam_study_variables.exp"

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NXOpen Python Stubs (for Intellisense)

Path: C:\Program Files\Siemens\NX2412\ugopen\pythonStubs

VSCode Configuration (.vscode/settings.json):

{
  "python.analysis.extraPaths": [
    "C:\\Program Files\\Siemens\\NX2412\\ugopen\\pythonStubs"
  ],
  "python.analysis.typeCheckingMode": "basic"
}

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Material Library Access

Library File: C:\Program Files\Siemens\NX2412\UGII\materials\physicalmateriallibrary.xml

Format: MatML XML format

Properties Available:

• Mass_Density__RHO__6 (kg/mm³)
• Youngs_Modulus_E__31 (Pa)
• PoissonsRatio (dimensionless)
• Yield_Strength_32 (Pa)
• Thermal_Expansion_A__34 (1/°C)
• Thermal_Conductivity__K__35 (mW/mm/°C)
• Specific_Heat_CP__23 (mJ/kg/°C)

Common Materials:

• AISI_Steel_1005 (E=200 GPa, ρ=7872 kg/m³, ν=0.25)
• AISI_Steel_4340 (E=193 GPa, ρ=7850 kg/m³, ν=0.284)
• Aluminum_6061-T6 (E=69 GPa, ρ=2700 kg/m³, ν=0.33)
• Titanium_Ti-6Al-4V (E=114 GPa, ρ=4430 kg/m³, ν=0.34)

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Nastran Solver

Solver Path: Embedded in NX2412 installation

Input Files: .dat (Nastran bulk data)

Output Files:

• .op2 (binary results - use pyNastran)
• .f06 (text results - human readable)

Material Units in .dat files:

• Young's Modulus: Pa (Pascals)
• Density: kg/mm³
• Poisson's Ratio: dimensionless

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Future Expansion

If using a different NX or Simcenter version, the user will explicitly configure:

1. Update this file with new paths
2. Update nx_updater.py configuration
3. Update .vscode/settings.json for new stub paths

Until then: ALWAYS use NX2412 paths as documented above.

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Validation Checklist

Before running any NX-related operation, verify:

• ✅ Python command uses atomizer environment
• ✅ NX paths point to NX2412 (NOT Simcenter3D_2412)
• ✅ Material library accessed from NX2412\UGII\materials
• ✅ Journal script uses NX2412\NXBIN\run_journal.exe

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Last Updated: 2025-11-17 Maintained By: Antoine Letarte Critical Importance: HIGH - Incorrect paths will cause system failures