Limits and troubleshooting - RevoEngine

Dashboard widgets and Assistant artifacts share interaction semantics but have different result-size limits.

Limit	Dashboard interaction contract	Assistant card
Rows	64	8
Cells per row	64	4
Elements, including FORM fields	256	Also subject to artifact row and cell limits
Fields per FORM	64	64 within total limits
Toolbar buttons per TABLE	16	16
Records per chart or table	Bound source reads to a usable dataset	5000
Columns per TABLE	Keep the visible grid usable	12; TEXT, NUMBER, DATE or BOOLEAN
Cell width and height	Follow the row layout	Width greater than 0 up to 100; height 80–800 px
Artifact rows plus sources	Not the Assistant artifact envelope	2 MB

Source and action bounds

Each target registry accepts up to 32 entries, at most four nested target levels.
An Inline registered source accepts up to 120000 code characters.
Registered inputs must be JSON object text without the reserved $widget key.
Source timeout: 5–600 seconds; memory: 32–1024 MiB.
Whole-widget refresh: 1–600 seconds when configured; cell timers: 1–86400 seconds.
Replacement navigation retains up to 12 frames. Pending ordered refresh commands are limited to 64.

Configured values remain subject to execution permissions and instance policy.

Diagnose the exact boundary

Symptom	Check
First render fails when reading `$widget`	Use `api.input()?.$widget ?? {}`.
Partial refresh rejected	Return exactly the requested IDs and no additional cells.
Missing binding value	Confirm the INPUT or selectable TABLE exists and the path is present.
Value returns to a default	Check `valueMode`, stable IDs and whether the page remounted.
Form never executes	Check validation and the FORM’s `on.submit`.
Job submitted but result is unknown	Query the exact receipt ID; acceptance is not completion.
Chart data rejected	Check series keys, axis types and finite numeric values.
Table selection lost	Confirm stable, unique row keys still exist in the returned dataset.
Shared card cannot run actions	Shared/report surfaces are inactive snapshots.
Permission denied	Check the viewer and executor’s permissions; dashboard visibility grants no resource access.

Validate initial and partial branches separately, including empty values and zero. A parsed result does not prove browser rendering, navigation or successful writes. Test write actions only in an authorized test environment.

Last modified on November 8, 2026