fix: Correct all NX installation paths from Simcenter3D_2412 to NX2412

CRITICAL PATH CORRECTION:
- Updated all documentation to use NX2412 installation
- Fixed README.md, dashboard/api/app.py, NXOPEN_INTELLISENSE_SETUP.md
- Updated archived NX_SOLVER_INTEGRATION.md for consistency
- Added SYSTEM_CONFIGURATION.md to document correct paths

Files Changed:
- README.md: NX path corrected to NX2412\NXBIN\run_journal.exe
- dashboard/api/app.py: NX executable path updated
- docs/NXOPEN_INTELLISENSE_SETUP.md: Stub path corrected
- docs/archive/NX_SOLVER_INTEGRATION.md: Example paths updated
- docs/SYSTEM_CONFIGURATION.md: NEW - Critical system path documentation

Key Configuration:
- Python Environment: atomizer (NOT test_env)
- NX Installation: C:\Program Files\Siemens\NX2412
- Material Library: NX2412\UGII\materials\physicalmateriallibrary.xml
- Python Stubs: NX2412\ugopen\pythonStubs

Reason: Simcenter3D_2412 is a separate installation and should not be used.
NX2412 is the correct primary CAD/CAE environment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -89,7 +89,7 @@ Atomizer enables engineers to:
    ```
 
 4. **Configure NX path** (edit if needed):
-   - Default NX path: `C:\Program Files\Siemens\Simcenter3D_2412\NXBIN\run_journal.exe`
+   - Default NX path: `C:\Program Files\Siemens\NX2412\NXBIN\run_journal.exe`
    - Update in `optimization_engine/nx_solver.py` if different
 
 ### Basic Usage

dashboard/api/app.py

@@ -595,7 +595,7 @@ def explore_sim_file(study_name: str):
         output_file = study_dir / 'expressions.json'
 
         # Execute journal
-        nx_executable = r"C:\Program Files\Siemens\Simcenter3D_2412\NXBIN\run_journal.exe"
+        nx_executable = r"C:\Program Files\Siemens\NX2412\NXBIN\run_journal.exe"
 
         result = subprocess.run(
             [nx_executable, str(journal_script), str(sim_file), str(output_file)],

docs/NXOPEN_INTELLISENSE_SETUP.md

@@ -266,7 +266,7 @@ This is **Step 1** of NXOpen integration. Future work:
 **Problem**: Autocomplete shows incorrect or outdated methods
 
 **Solution**: Ensure stub files match your NX version:
-- NX 2412 → Use `Simcenter3D_2412\ugopen\pythonStubs`
+- NX 2412 → Use `NX2412\ugopen\pythonStubs`
 - Different NX version → Update stub path in settings
 
 ### Type Errors Shown

docs/SYSTEM_CONFIGURATION.md

@@ -0,0 +1,144 @@
+# System Configuration
+
+> **Critical**: These are the ONLY paths and environments to be used unless explicitly reconfigured by the user.
+
+---
+
+## 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:
+```bash
+# 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
+```
+
+---
+
+## 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.
+
+---
+
+## NX Journal Execution
+
+**Command Template**:
+```bash
+"C:/Program Files/Siemens/NX2412/NXBIN/run_journal.exe" <journal_script.py> -args <arg1> <arg2>
+```
+
+**Example**:
+```bash
+"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"
+```
+
+---
+
+## NXOpen Python Stubs (for Intellisense)
+
+**Path**: `C:\Program Files\Siemens\NX2412\ugopen\pythonStubs`
+
+**VSCode Configuration** (`.vscode/settings.json`):
+```json
+{
+  "python.analysis.extraPaths": [
+    "C:\\Program Files\\Siemens\\NX2412\\ugopen\\pythonStubs"
+  ],
+  "python.analysis.typeCheckingMode": "basic"
+}
+```
+
+---
+
+## 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)
+
+---
+
+## 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
+
+---
+
+## 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.
+
+---
+
+## 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`
+
+---
+
+**Last Updated**: 2025-11-17
+**Maintained By**: Antoine Letarte
+**Critical Importance**: HIGH - Incorrect paths will cause system failures

docs/archive/NX_SOLVER_INTEGRATION.md

@@ -123,7 +123,7 @@ By default, NXSolver auto-detects NX installation:
 solver = NXSolver(nastran_version="2412")
 # Searches:
 # - C:/Program Files/Siemens/NX2412
-# - C:/Program Files/Siemens/Simcenter3D_2412
+# - C:/Program Files/Siemens/NX2412
 # - C:/Program Files (x86)/Siemens/NX2412
 ```