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title: "Thread: Unmapped Issue"
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summary: 2 Discord messages from ℹ️ - Information/⁉️-questions/threads/unmapped-issue.md.
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# Thread: Unmapped Issue

Category: **ℹ️ - Information**
Parent channel: **#⁉️-questions**
Thread ID: `1440176558596821013`

Messages: **2**

## message-1440176558596821013

**2025-11-18T03:07:28.756+00:00 — hu tieu (@wiliku)**

- Message ID: `1440176558596821013`
- Author ID: `326493801675882506`
- Nickname: hu tieu
- User name: wiliku
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1440176558596821013/1440176558596821013
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/unmapped-issue/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/unmapped-issue/2025-11/2025-11.json

**Content**

```text
Hello, I am trying to use gf180 in order to run through the digital flow,  however I am running into this error that I am unsure how to find information to solve.

120. Executing JSON backend.
[22:01:19] VERBOSE  Parsing synthesis checks…                           pyosys.py:60
────────────────────────────── Unmapped Cells Checker ──────────────────────────────
[22:01:19] VERBOSE  Running 'Checker.YosysUnmappedCells' at             step.py:1138
                    'runs/RUN_2025-11-17_22-01-17/07-checker-yosysunmap
                    pedcells'…
[22:01:19] ERROR    2 Unmapped Yosys instances found.                 checker.py:127
Classic - Stage 7 - Unmapped Cells Checker ━━╺━━━━━━━━━━━━━━━━━━━━━━━━  6/79 0:00:02
[22:01:19] WARNING  The following warnings were generated by the flow:   flow.py:703
[22:01:19] WARNING  [Checker.LintWarnings] 10 Lint warnings found.       flow.py:705
[22:01:19] ERROR    The following error was encountered while        __main__.py:189
                    running the flow:
                    2 Unmapped Yosys instances found.
[22:01:19] ERROR    LibreLane will now quit.                         __main__.py:190

It appears that I can find them in: runs/RUN_2025-11-17_22-01-17/07-checker-yosysunmappedcells but the only information I get from it is I have 2 unmapped instances, nothing about what it is. Could someone point me in the right area to fix this?
```

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---

## message-1440241160600813668

**2025-11-18T07:24:11.074+00:00 — Leo Moser (mole99) (@mole99)**

- Message ID: `1440241160600813668`
- Author ID: `323371864074485771`
- Nickname: Leo Moser (mole99)
- User name: mole99
- Type: `Default`
- Discord message: https://discord.com/channels/1361349522684510449/1440176558596821013/1440241160600813668
- Archive source: https://discord.wafer.space/wafer-space/%E2%84%B9%EF%B8%8F%20-%20Information/%E2%81%89%EF%B8%8F-questions/unmapped-issue/2025-11/2025-11.json
- Archive source: https://discord.wafer.space/wafer-space/Information/questions/unmapped-issue/2025-11/2025-11.json

**Content**

```text
Hi, I assume you made changes to the template? If so, which changes did you make?

If those two unmapped cells are the SRAM macros: To remove the SRAM macros, you need to remove the instances from the RTL, the `config.yaml` and the `pdn_cfg.tcl`.
```

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