CMM: gocmm-debug probes the startup NRE (part-group match), checks real exe

goCMM matches the registry 'Selected Part Group' against the
ApplicationSettings.xml <PartGroup FullName> entries with a case-sensitive
compare. No match -> SelectedPartGroup null -> "Object reference not set to
an instance of an object" at start. This is a different failure from the
registry SecurityException the script already probes.

- PROBE 3: read the reg value (32-bit view) + every FullName in the XML,
  Ordinal-compare, and report exact / case-only / no-match / missing-XML.
  Case-only and no-match name the d441abd canonicalization fix as the remedy.
- Version check now looks for the real goCMM.exe, not the nonexistent
  GEAOperatorFriendlyInterface.exe (was a false MISSING).
- .bat header documents both failure modes it now diagnoses.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

playbook/shopfloor-setup/gea-shopfloor-cmm/scripts/gocmm-debug.bat

@@ -4,9 +4,14 @@ REM
 REM   *** RUN THIS AS THE OPERATOR (the locked-down shop-floor user). ***
 REM   *** DO NOT right-click "Run as administrator" - that hides the bug. ***
 REM
-REM Reproduces the goCMM "Requested registry access is not allowed" error and
-REM dumps the goCMM registry key's ACL so we can confirm the lockdown stripped
-REM the BUILTIN\Users write grant. Output lands in C:\Logs\CMM\.
+REM Diagnoses two goCMM failures:
+REM   1. "Requested registry access is not allowed" - dumps the goCMM key ACL
+REM      to confirm lockdown stripped the BUILTIN\Users write grant.
+REM   2. "Object reference not set to an instance of an object" at start -
+REM      PROBE 3 compares the registry 'Selected Part Group' against the
+REM      ApplicationSettings.xml part groups (case-sensitive) and names the
+REM      mismatch (host form / \shared vs \SHARED) that nulls SelectedPartGroup.
+REM Output lands in C:\Logs\CMM\.
 
 setlocal
 set "HERE=%~dp0"