processing / processing/processing4
macOS exported app fails with `JRExLoadFullError`
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@catilac is already working on this.
Since Mar 5, 2026.
bug
build system
- Dominant language
- Java
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Description
Description
A user reported on Reddit that exported applications from Processing 4 fail to launch on macOS, showing a JRExLoadFullError or JRELoadError popup.
Edit: Exporting on macOS may also throw error java.util.NoSuchElementException: No value present. See https://github.com/processing/processing4/issues/1193
Cause
The export logic in JavaBuild.java looks for a directory that starts with jdk-, but in our current setup, the embedded JDK starts with jdk (without the dash). This causes the path resolution to fail, and no JRE is bundled, leading to the JRExLoadFullError.
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