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mxcli run --local cannot run a Mendix 9 app #1437
Description
Environment
- mxcli: v0.26.0 (release binary, 2026-10-11)
- Mendix app seen on: Siemens FSM template (Marketplace) 9.24.2; 10.24 / 11.13.0 converted copies
- OS: Linux x86_64 cloud container (no Studio Pro;
mx/mxbuild only)
Summary
mxcli run --local cannot run a Mendix 9 app. Command / document type: mxcli run --local. Seen on: FSM template 9.24.2. — occurrences: 1
Reproduction
JAVA_HOME=<jdk17> mxcli run --local --db-type hsqldb -p <9.24 app>Expected
a JDK the model version supports, or a clear message.
Actual
mxbuild 9.24's Gradle 7.6: Unsupported class file major version 65 (mxcli resolves JDK 21 even with JAVA_HOME set to 17)
a Gradle stack error; a 9.x model has no JavaVersion setting to steer it.
Impact
usability, 1 occurrence(s) in the 2026-10-12 round-trip runs.
Activity
github-actions commentedon Oct 12, 2026
Issue Triage
Summary:
The user reports that
mxcli run --localfails to start a Mendix 9 app because mxcli incorrectly selects JDK 21, causing a Gradle “Unsupported class file major version 65” error.Checklist (bug report)
mxcli run --localon a Mendix 9 app)mxcli diag --bundleor at least the relevant logs)What’s missing:
Could you please attach the session log or run
mxcli diag --bundleand share the resulting archive? This will help us see exactly how mxcli is selecting the JDK and any other relevant details.Thank you for reporting the issue! Once we have the logs we can investigate further.
Automated triage via OpenRouter — workflow source
Merge pull request #1147 from ako/fix/1437-run-local-mendix9-jdk