From 55f0f917c7000ac5c712c24ab269632ed5c54039 Mon Sep 17 00:00:00 2001
From: Antoine <antoine.letarte@gmail.com>
Date: Wed, 11 Feb 2026 15:16:26 +0000
Subject: [PATCH] Add NX diagnostic logging: OpenActiveDisplay result, load
 status, Parts.Open details

Need to see why Parts.Open returns None even from the master model folder.
Logs: basePart1 type/name/path, unloaded parts status, file existence checks.
---
 optimization_engine/nx/solve_simulation.py | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/optimization_engine/nx/solve_simulation.py b/optimization_engine/nx/solve_simulation.py
index 7431780a..c24c9aa1 100644
--- a/optimization_engine/nx/solve_simulation.py
+++ b/optimization_engine/nx/solve_simulation.py
@@ -849,12 +849,33 @@ def solve_simple_workflow(
     print(f"[JOURNAL] Opening simulation: {sim_file_path}")
 
     # Open the .sim file
+    print(f"[JOURNAL]   sim_file_path = {sim_file_path}")
+    print(f"[JOURNAL]   File exists: {os.path.exists(sim_file_path)}")
     basePart1, partLoadStatus1 = theSession.Parts.OpenActiveDisplay(
         sim_file_path, NXOpen.DisplayPartOption.AllowAdditional
     )
+
+    # Diagnostic: check load status
+    print(f"[JOURNAL]   OpenActiveDisplay result: basePart1={basePart1}")
+    print(f"[JOURNAL]   basePart1 type: {type(basePart1).__name__}" if basePart1 else "[JOURNAL]   basePart1 is None!")
+    if basePart1:
+        print(f"[JOURNAL]   basePart1.Name: {basePart1.Name}")
+        print(f"[JOURNAL]   basePart1.FullPath: {basePart1.FullPath}")
+    try:
+        n_statuses = partLoadStatus1.NumberUnloadedParts
+        print(f"[JOURNAL]   Unloaded parts: {n_statuses}")
+        for i in range(n_statuses):
+            name = partLoadStatus1.GetPartName(i)
+            status = partLoadStatus1.GetStatus(i)
+            status_desc = partLoadStatus1.GetStatusDescription(i)
+            print(f"[JOURNAL]     Part[{i}]: {name} — status={status} ({status_desc})")
+    except Exception as e:
+        print(f"[JOURNAL]   Could not read load status details: {e}")
     partLoadStatus1.Dispose()
 
     workSimPart = theSession.Parts.BaseWork
+    print(f"[JOURNAL]   BaseWork: {workSimPart.Name if workSimPart else 'None'}")
+    print(f"[JOURNAL]   Parts count: {sum(1 for _ in theSession.Parts)}")
 
     # =========================================================================
     # STEP 1: UPDATE EXPRESSIONS IN GEOMETRY PART (if any)
@@ -901,8 +922,21 @@ def solve_simple_workflow(
                 ):
                     prt_path = os.path.join(working_dir, filename)
                     print(f"[JOURNAL]   Loading geometry part: {filename}")
+                    print(f"[JOURNAL]     Full path: {prt_path}")
+                    print(f"[JOURNAL]     File exists: {os.path.exists(prt_path)}")
+                    print(f"[JOURNAL]     File size: {os.path.getsize(prt_path) if os.path.exists(prt_path) else 'N/A'}")
                     try:
                         loaded_part, partLoadStatus = theSession.Parts.Open(prt_path)
+                        try:
+                            n_unloaded = partLoadStatus.NumberUnloadedParts
+                            if n_unloaded > 0:
+                                print(f"[JOURNAL]     Parts.Open unloaded parts: {n_unloaded}")
+                                for i in range(n_unloaded):
+                                    pn = partLoadStatus.GetPartName(i)
+                                    ps = partLoadStatus.GetStatusDescription(i)
+                                    print(f"[JOURNAL]       [{i}]: {pn} — {ps}")
+                        except:
+                            pass
                         partLoadStatus.Dispose()
                         # Check if load actually succeeded (Parts.Open can return None)
                         if loaded_part is not None:
@@ -911,8 +945,14 @@ def solve_simple_workflow(
                             break
                         else:
                             print(f"[JOURNAL]   WARNING: Parts.Open returned None for {filename}")
+                            # Check if part got loaded anyway under a different reference
+                            print(f"[JOURNAL]   Parts after Open attempt: {sum(1 for _ in theSession.Parts)}")
+                            for p in theSession.Parts:
+                                print(f"[JOURNAL]     - {p.Name} ({type(p).__name__})")
                     except Exception as e:
                         print(f"[JOURNAL]   WARNING: Could not load {filename}: {e}")
+                        import traceback
+                        traceback.print_exc()
 
         if geom_part:
             try: