Nodes 2.0 break Mask Rect Area node functionality

[andreszs]

Prerequisites

• I am running the latest version of ComfyUI
• I have searched existing issues to make sure this isn't a duplicate
• I have tested with all custom nodes disabled (see how)

What happened?

Nodes 2.0 is breaking the ImpactPack Mask Rect Area nodes: whenever a value is changed, a Node Widgets Error replaces the node's content (view screenshot)

can't access propery "properties", node is undefined.

Steps to Reproduce

1. Install ImpactPack
2. Add Mask Rect Area node
3. Change its values.

How is this affecting you?

Workflow won't execute

ComfyUI Frontend Version

1.34.9

Browser

Firefox

Console Errors

10:15:16.888 TypeError: can't access property "properties", node is undefined
    onNodeCreated mask-rect-area.js:232
    g useGraphNodeManager.ts:341
    C NodeWidgets.vue:184
    my runtime-core.esm-bundler.js:199
    Eo runtime-core.esm-bundler.js:206
    jre runtime-core.esm-bundler.js:6386
    set runtime-core.esm-bundler.js:6297
    set value reactivity.esm-bundler.js:1509
    0 WidgetInputNumber.vue:11
    my runtime-core.esm-bundler.js:199
    Eo runtime-core.esm-bundler.js:206
    jre runtime-core.esm-bundler.js:6386
    set runtime-core.esm-bundler.js:6297
    set value reactivity.esm-bundler.js:1509
    0 WidgetInputNumberInput.vue:70
    my runtime-core.esm-bundler.js:199
    Eo runtime-core.esm-bundler.js:206
    jre runtime-core.esm-bundler.js:6386
    writeValue index.mjs:84
    updateModel index.mjs:929
    spin index.mjs:389
    repeat index.mjs:381
    onUpButtonMouseDown index.mjs:396
    mousedown index.mjs:972
    my runtime-core.esm-bundler.js:199
    Eo runtime-core.esm-bundler.js:206
    n runtime-dom.esm-bundler.js:729
    Qh runtime-dom.esm-bundler.js:680
    Tie runtime-dom.esm-bundler.js:698
    Rie runtime-dom.esm-bundler.js:775
    R runtime-core.esm-bundler.js:4873
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    E runtime-core.esm-bundler.js:4932
    I runtime-core.esm-bundler.js:5112
    y runtime-core.esm-bundler.js:4674
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    D runtime-core.esm-bundler.js:5326
    run reactivity.esm-bundler.js:225
    H runtime-core.esm-bundler.js:5454
    V runtime-core.esm-bundler.js:5229
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    E runtime-core.esm-bundler.js:4932
    I runtime-core.esm-bundler.js:5112
    y runtime-core.esm-bundler.js:4674
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    D runtime-core.esm-bundler.js:5326
    run reactivity.esm-bundler.js:225
    H runtime-core.esm-bundler.js:5454
    V runtime-core.esm-bundler.js:5229
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    D runtime-core.esm-bundler.js:5326
    run reactivity.esm-bundler.js:225
    H runtime-core.esm-bundler.js:5454
    V runtime-core.esm-bundler.js:5229
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    D runtime-core.esm-bundler.js:5326
    run reactivity.esm-bundler.js:225
    H runtime-core.esm-bundler.js:5454
    V runtime-core.esm-bundler.js:5229
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    D runtime-core.esm-bundler.js:5406
    run reactivity.esm-bundler.js:225
    runIfDirty reactivity.esm-bundler.js:263
    my runtime-core.esm-bundler.js:199
    lB runtime-core.esm-bundler.js:408
    promise callback*oB runtime-core.esm-bundler.js:322
    mI runtime-core.esm-bundler.js:317
    scheduler runtime-core.esm-bundler.js:5448
    trigger reactivity.esm-bundler.js:253
    cI reactivity.esm-bundler.js:311
    notify reactivity.esm-bundler.js:597
    trigger reactivity.esm-bundler.js:571
    set value reactivity.esm-bundler.js:1456
    setup runtime-core.esm-bundler.js:2494
    promise callback*setup runtime-core.esm-bundler.js:2493
    my runtime-core.esm-bundler.js:199
    lie runtime-core.esm-bundler.js:7907
    aie runtime-core.esm-bundler.js:7868
    V runtime-core.esm-bundler.js:5216
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    E runtime-core.esm-bundler.js:4932
    I runtime-core.esm-bundler.js:5112
    y runtime-core.esm-bundler.js:4674
    E runtime-core.esm-bundler.js:4932
    I runtime-core.esm-bundler.js:5112
    y runtime-core.esm-bundler.js:4674
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
    y runtime-core.esm-bundler.js:4688
    D runtime-core.esm-bundler.js:5326
    run reactivity.esm-bundler.js:225
    H runtime-core.esm-bundler.js:5454
    V runtime-core.esm-bundler.js:5229
    M runtime-core.esm-bundler.js:5182
    y runtime-core.esm-bundler.js:4700
    E runtime-core.esm-bundler.js:4932
    R runtime-core.esm-bundler.js:4855
    C runtime-core.esm-bundler.js:4820
useErrorHandling.ts:60:13

Logs

Additional Context

┆Issue is synchronized with this Notion page by Unito

[coderabbitai]

🔗 Similar Issues

Possible Duplicates

• Nodes 2.0 break Mask Rect Area node canvas #7615

Related Issues

• Using ImpactConditionalBranch node in a subgraph crashes and deletes the entire workflow #5707

🔗 Related PRs

#6898 - Cleanup: Consistent use of Nodes 2.0 in user facing strings. [merged]
#7205 - Fix compatibility with older browsers [merged]
#7251 - fix: Vue Nodes dropdown doesn't show selected model from Asset Browser [merged]
#7302 - fix: node shape not reactive in vueNodes mode [merged]
#7489 - fix: right side panel visual indicators don't update for color picker… [merged]

👤 Suggested Assignees

• andreszs
• EgorkaSanyok
• DrJKL
• AustinMroz
• luke-mino-altherr

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💬 Have feedback or questions? Drop into our discord or schedule a call!

[dosubot]

This is a known regression: Nodes 2.0 (the new Vue-based UI) breaks many custom nodes, including ImpactPack's Mask Rect Area, due to major changes in how node widgets and properties are managed. The error happens because the new node lifecycle and widget system can lose references to the underlying node, so when a widget tries to access node.properties, it fails and triggers the "Node Widgets Error" you see. This is especially common with nodes that use custom previews or mask editors, which were heavily refactored in frontend versions after 1.32.9 (details, more context, technical explanation).

There’s no simple fix right now. The maintainers are aware and are actively refactoring the mask editor and context menu logic, but for now, the only reliable workarounds are to use the classic UI or downgrade the frontend to 1.32.9 (with the tradeoff that you may lose some new features or previews). Custom node developers will need to update their nodes to integrate with the new Vue node/widget system to restore compatibility (more info).

If you rely on these nodes, keep an eye on release notes and issue trackers for updates.

To reply, just mention @dosu.

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[jtydhr88]

should be fixed after next release