BSON Serialization Debugging Skill

Diagnose BSON serialization mismatches between Mendix ModelSDK and Studio Pro.

1|Updated Jun 5, 2026

Search Tags:#debugging #serialization #bson #mendix #mdl #modelsdk

Ready to run

npx skills add https://github.com/engalar/mxcli-taskdemo --skill bson-serialization-debugging-skill

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: BSON Serialization Debugging Skill
Source: https://github.com/engalar/mxcli-taskdemo/tree/main/TaskDemo/.claude/skills/debug-bson
Command: npx skills add https://github.com/engalar/mxcli-taskdemo --skill bson-serialization-debugging-skill

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill resolves discrepancies between SDK-generated BSON and Mendix Studio Pro expectations, preventing issues where objects appear empty, missing, or incorrectly formatted in the Mendix IDE.

Core Features & Use Cases

BSON Comparison: Provides workflows to dump and diff BSON structures between SDK output and Studio Pro reference objects.
Serialization Guidance: Offers deep technical insights into array version markers, nested object structures, and field naming conventions.
Troubleshooting: Addresses common errors like CE0642, CE0463, and TypeCacheUnknownTypeException by providing structural templates and diagnostic steps.

Quick Start

Use the debug-bson skill to compare the BSON structure of a broken page object against a manually fixed reference object in your project.

Frequently Asked Questions about BSON Serialization Debugging Skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I fix BSON serialization mismatches between Mendix ModelSDK and Studio Pro?▼

Fix BSON serialization mismatches by dumping and diffing the SDK output against a Studio Pro reference object to identify incorrect field names, nested structures, and array version markers. This ensures compliance with Mendix internal data formats to prevent design-time errors.

Why does my Mendix ModelSDK generated object appear empty or missing in Studio Pro?▼

Mendix ModelSDK objects appear empty or missing due to discrepancies between SDK-generated BSON and Studio Pro expectations. Diagnose the BSON structure to resolve incorrect field naming conventions and nested object formatting that cause the IDE rendering issue.

How do I resolve Mendix errors CE0642 and CE0463 caused by MDL generation?▼

Resolve Mendix errors CE0642 and CE0463 by using diagnostic workflows to compare broken page object BSON against a manually fixed reference. This identifies structural template issues and array version markers in the generated MDL causing the exceptions.

What is the best way to debug TypeCacheUnknownTypeException in Mendix SDK BSON?▼

Debug TypeCacheUnknownTypeException by applying structural templates and diagnostic steps to validate nested object structures and field naming conventions in your BSON. This verifies that the generated MDL complies with internal Mendix data formats.

How do I compare BSON structures from Mendix ModelSDK output against a reference object?▼

Compare BSON structures by dumping the SDK output and a manually fixed reference object from your project, then diffing the two. This workflow highlights incorrect array version markers and field names to ensure correct serialization.

Does Mendix ModelSDK require specific array version markers for BSON serialization?▼

Mendix ModelSDK BSON serialization requires specific array version markers and correct nested object structures to comply with internal data formats. Missing or incorrect markers cause runtime and design-time errors in Studio Pro when parsing the MDL.