# Core Engine Release 4.42
September 2025
We upgraded! What's new? Learn more about new features, technical changes and solved bugs in 4App Core Engine.
Note on upgrading: If you skip a version when upgrading, check all release and patch notes in between for important information. They apply cumulative.
Note on individualization: If your 4ALLPORTAL is highly customized or if you installed individual apps, please contact your implementation partner before upgrading. We recommend checking your custom contents, especially layouts and object renderers, carefully after an upgrade.
# Technical Changes & Admin Instructions
# New Metric Renderer Attribute
We have added the new field renderer attribute forced_unit to the metric renderer. This allows any CEMetric value to be automatically converted into a specified unit, regardless of the original unit it was stored in. For example, values stored in mm, cm, or m can now consistently be rendered as ft. This ensures uniform unit display across different data sources.
Further information: Metric Renderer documentation
# Search Query Improvement
We have optimized the search query execution by reusing joins. This reduces redundancy during query generation. The improvement applies only to queries that do not contain the operators OR, NOT EQUAL, NOT, NOT IN or NOT LIKE.
# Solved Bugs
- Fix the selection of objects in a reference renderer with tiles. If attribute 'fill_placeholder_tiles' is true, clicking on an '+' tile allows to select only one object for that specific tile.
- Fix the incorrect display of the thousand separator in numbers
- Fix not working upload of a representative image
- Fix the ability to drag and drop elements into an empty list (e.g. in the menu structure in the personal user settings)
- Fix missing dimension icons in a dimension dropdown menu or pop-up
- Fix for not loading all available version actions after changing the current version
- Fix for not updating the list of versions after restoring an archived version
- Fix the double focusing of the header icons when navigating using the tab key
- Fix for not generating previews for specific HEIC-files
- Fix the error message that occurred when the response from the in-app help chatbot contained a reference
- Fix security vulnerabilities by updating dependencies
- Fix missing space between action buttons of list-based field renderers
- Fix missing display of validation warnings in object renderers
# Patch releases
# Version 4.42.1
- Fix the loading of suggestions for typeahead
# Version 4.42.2
- Improve alpha channel detection for transparent images