How to Reconnect Disconnected Balloons in Mechanical BOM Detailing?
When mechanical components are copied, trimmed, or modified, item balloons can detach from their underlying Part References, showing '?' question marks or obsolete numbers. Reconnect by executing GMBALLOON renumbering, running GMDETAIL sync, or manually reattaching balloon leader vertices to valid Part References.
Tested on GstarCAD Mechanical 2027 and AutoCAD Mechanical 2027.
ISO 6433 (Technical drawings — Item references), DIN 6771.
Gstarcademy Diagnostics Board · Audited
Suzhou Gstarsoft Co., Ltd. (SSE: 688657)
Direct Diagnostic Solution & Protocol
Quick Resolution: When mechanical components are copied, trimmed, or modified, item balloons can detach from their underlying Part References, showing '?' question marks or obsolete numbers. Reconnect by executing GMBALLOON renumbering, running GMDETAIL sync, or manually reattaching balloon leader vertices to valid Part References.
Step-by-Step Engineering Execution
Step 1: Locate Dangling Balloons
Inspect the assembly drawing for balloons showing empty values or exclamation badges. In GstarCAD Mechanical, disconnected balloons lose their associative leader snap.
Step 2: Verify Underlying Part Reference
Type GMPARTREF → Edit. Click the component to verify if its Part Reference block was accidentally erased during trimming operations. If missing, insert a new Part Reference.
Step 3: Re-link Balloon Leader
Select the orphaned balloon, right-click → 'Reattach Leader', and snap the leader arrow directly onto the component's visible contour edge.
Step 4: Execute BOM Renumbering & Parts List Refresh
Type GMBALLOON → Renumber. Select all balloons. Open the BOM manager (GMBOM) to verify item numbers match the master Parts List table.
Cross-Disciplinary Verification & Support
Underlying Kernel Mechanics & Automated Prevention Protocol
To permanently prevent recurrence of How to Reconnect Disconnected Balloons in Mechanical BOM Detailing? across enterprise project directories, CAD managers must understand how the underlying DWG object database (AcDbDatabase / GcDbDatabase) and graphics display pipeline manage entity handles, symbol tables, and external dependencies:
| Diagnostic Command / Variable | Recommended Production Value | Engineering Function & Impact |
|---|---|---|
| AUDIT / RECOVERALL | Fix Errors = Yes (Y) |
Validates B-tree symbol tables, repairs orphaned dictionary handles, and heals nested Xrefs. |
| -PURGE → Regapps (R) | Verify Each = No (N) |
Strips thousands of unreferenced third-party Registered Application IDs that bloat DWG memory. |
| GRAPHICSCONFIG | Hardware Acceleration = ON | Verifies DirectX 11/12 or OpenGL GPU driver allocation and clears corrupted display cache buffers. |