# Sigma Computing: Major incident: Users unable to enter edits to Workbooks

**Summary:** Sigma Computing reported a major incident in which users who had recently edited a Workbook received errors when making further edits. The recorded start is 2023-10-06 20:27 UTC, but resolution is listed earlier, at 2023-08-09 22:00 UTC; duration is unknown. Engineering completed a postmortem and linked an RCA on Sigma Community. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2023-10-06 20:27 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/yb8s46dljz6y](https://stspg.io/yb8s46dljz6y)
- [Company: Sigma Computing](https://rewindex.com/company/sigma-computing.md)
- Versions: before (none: first archived) → after incident\_version:77/7qxfk1y23ccs@657d47bc61b5
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Users unable to enter edits to Workbooks
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2023-10-06 20:27 UTC
```

**5. Added: Resolved time**

```diff
+ 2023-08-09 22:00 UTC
```

**6. Added: Update** (resolved) · 2023-08-09 22:00 UTC

```diff
+ Users who had recently made edits to a workbook received an error while attempting to make further edits to that Workbook.
```

**7. Added: Update** (postmortem) · 2023-10-06 20:30 UTC

```diff
+ Sigma Engineering has completed the postmortem of this incident. A Root Cause Analysis \(RCA\) is available on the Sigma Community site: [Postmortem for Aug 9th, 2023: Users unable to enter edits to workbooks](https://community.sigmacomputing.com/t/postmortem-for-aug-9th-2023-users-unable-to-enter-edits-to-workbooks/2617)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2023-10-06 20:27 UTC | Major incident: Users unable to enter edits to Workbooks (this change) | outage |

All Sigma Computing changes: [timeline](https://rewindex.com/company/sigma-computing/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/ib2e7e1109dae4b · Markdown: https://rewindex.com/change/ib2e7e1109dae4b.md · JSON: https://rewindex.com/api/v1/changes/ib2e7e1109dae4b · Generated 2026-10-18T02:31:30.228Z