[Bug] ALTER PAGE SET Title / SET Label silently succeeds but change does not persist

[Chendodelangen]

Summary

ALTER PAGE SET Title and SET Label (on input widgets) return Altered page but the change is not saved. The next DESCRIBE PAGE still shows the original value.

Environment

• mxcli version: current
• Mendix version: 10.24.15

Steps to Reproduce

# Set page title
./mxcli -p MyProject.mpr -c "ALTER PAGE Mod.MyPage { SET Title = 'New title' };"
# Output: Altered page Mod.MyPage  ← appears successful

# Verify
./mxcli -p MyProject.mpr -c "DESCRIBE PAGE Mod.MyPage"
# Output still shows: Title: 'Old title'

# Same behaviour for widget labels
./mxcli -p MyProject.mpr -c "ALTER PAGE Mod.MyPage { SET Label = 'New label' ON textBox1 };"
# Output: Altered page Mod.MyPage
# DESCRIBE still shows: Label: 'Old label'

Expected Behaviour

The title / label is updated in the model, or mxcli returns an error explaining why it cannot be changed.

Actual Behaviour

The operation reports success but the model is unchanged. No error, no warning.

Root Cause (suspected)

Mendix stores page titles and widget labels as TranslatableString internally. mxcli likely writes to a slot that does not match the language-specific storage format, so the value is discarded on serialisation.

Workaround

Edit the title or label manually in Studio Pro.

Severity

Medium — silent failure is misleading; the change appears to have been applied but wasn't.

[github-actions]

Issue Triage

Summary:
The ALTER PAGE SET Title and SET Label commands report success but do not persist the changes in the .mpr file.

Checklist for bug report completeness

Required info	Present?	Details
mxcli version (exact output of mxcli --version or commit/build)	❌	Only “current” is given; need the exact version string.
Mendix version of the project	✅	10.24.15
Scenario (what the user was trying to do)	✅	CLI commands to alter page title and widget label, with commands shown.
Expected output	✅	Title/label should be updated (or an error should be returned).
Experienced output	✅	Command reports “Altered page …” but DESCRIBE PAGE shows the original value; no error/warning.
AI bug report (output of mxcli diag --bundle or session log)	❌	Not provided.

What’s missing:

• The precise mxcli --version output (or commit/build identifier).
• The diagnostic bundle or session log from mxcli diag --bundle to help investigate the internal state.

Could you please add those details? Once we have the exact mxcli version and the diagnostic information, we’ll be able to look into why the changes aren’t being saved. Thank you for reporting this issue!

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Automated triage via OpenRouter — workflow source

[Chendodelangen]

Additional information requested by the triage bot:

mxcli version:

v0.7.0-dirty (2026-04-21T08:30:06Z)
Go: go1.26.2 windows/amd64

Diagnostic log entries (from session on 2026-04-24):

The following entries confirm the silent success behaviour. Both SET Title and SET Label commands returned INFO-level execute events (i.e. reported success) but the subsequent DESCRIBE PAGE showed no change persisted:

{"time":"2026-04-24T10:30:25.6432573+02:00","level":"INFO","msg":"session_start","version":"v0.7.0-dirty","mode":"batch","args":["mxcli.exe","-p","AssetManagement.mpr","-c","ALTER PAGE AuditTrail_Custom.AuditTrail_Asset_ReasonForChange { SET Title = 'Reason for change (optional)'; SET Label = 'Reason for change (optional, max 120 characters)' ON textBox1 };"],"pid":12532}
{"time":"2026-04-24T10:30:26.0064861+02:00","level":"INFO","msg":"execute","stmt_type":"AlterPageStmt","stmt_summary":"ALTER PAGE AuditTrail_Custom.AuditTrail_Asset_ReasonForChange","duration_ms":730}
{"time":"2026-04-24T10:30:56.0336423+02:00","level":"INFO","msg":"session_start","version":"v0.7.0-dirty","mode":"batch","args":["mxcli.exe","-p","AssetManagement.mpr","-c","ALTER PAGE AuditTrail_Custom.AuditTrail_Asset_ReasonForChange { SET Label = 'Reason for change (optional, max 120 chars)' ON textBox1 };"],"pid":19080}
{"time":"2026-04-24T10:30:56.7762495+02:00","level":"INFO","msg":"execute","stmt_type":"AlterPageStmt","stmt_summary":"ALTER PAGE AuditTrail_Custom.AuditTrail_Asset_ReasonForChange","duration_ms":733}

No execute_error entry was emitted for either command. The DESCRIBE PAGE after each attempt still showed the original title and label text, confirming the change was silently discarded.

A full diagnostic bundle (mxcli-diag-20260424-110448.tar.gz) is available and can be shared if needed.