# Sigma Computing: Major incident: Exports with Color Conditional Formatting of "None" Failing

**Summary:** Sigma Computing reported a major (Severity 0) incident affecting Excel and CSV exports from some workbooks with Color Conditional Formatting of "None". It started at 2023-08-14 14:52 UTC and was marked resolved at 2023-08-14 17:07 UTC, lasting 2 h 15 min. Sigma later published a postmortem link; no cause or fix is detailed in the evidence. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2023-08-14 14:52 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/zy8xc6tk9fvj](https://stspg.io/zy8xc6tk9fvj)
- [Company: Sigma Computing](https://rewindex.com/company/sigma-computing.md)
- Versions: before (none: first archived) → after incident\_version:77/rp0dw946jrfm@10fc562ba2dc
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Exports with Color Conditional Formatting of "None" Failing
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ postmortem
```

**4. Added: Start time**

```diff
+ 2023-08-14 14:52 UTC
```

**5. Added: Resolved time**

```diff
+ 2023-08-14 17:07 UTC
```

**6. Added: Affected components**

```diff
+ AWS - Sigma - AWS (Canada), AWS - Sigma - AWS (Europe), AWS - Sigma - AWS (US), GCP - Sigma - GCP (US), Sigma - AWS (Canada), Sigma - AWS (Europe), Sigma - AWS (US), Sigma - GCP (US)
```

**7. Added: Update** (investigating) · 2023-08-14 14:52 UTC

```diff
+ Sigma Computing is currently addressing a Severity 0 incident with some exports to Excel, CSV consistently failing.
```

**8. Added: Update** (resolved) · 2023-08-14 17:07 UTC

```diff
+ This incident regarding exports to Excel and CSV failing on some workbooks has been resolved. Incident End Time: Approximately 16:34 UTC August 14, 2023 We will perform a root cause analysis (RCA) and publish our findings in a postmortem note to the Sigma Community site in coming days. You will receive a notification when that occurs.
```

**9. Added: Update** (postmortem) · 2023-10-06 20:55 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 14th: Exports with Color Conditional Formatting of None](https://community.sigmacomputing.com/t/postmortem-for-aug-14th-exports-with-color-conditional-formatting-of-none/2619)
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2023-08-14 14:52 UTC | Major incident: Exports with Color Conditional Formatting of "None" Failing (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/i3c6131f8fce557 · Markdown: https://rewindex.com/change/i3c6131f8fce557.md · JSON: https://rewindex.com/api/v1/changes/i3c6131f8fce557 · Generated 2026-10-18T03:33:48.520Z