---
title: MARKLESS_SHARED_MEMBER_UNKNOWN
description: "Shared state has no such member: a Markless compiler error."
sidebar: { hidden: true }
search: { keywords: ["SHARED_MEMBER_UNKNOWN","shared member unknown","markless error"] }
pagination: false
---

**Error** from the compiler, while it builds your `.tsrx` files.

## What happened

Markless prints the message, the reason, and a suggestion:

```text
MARKLESS_SHARED_MEMBER_UNKNOWN: Cannot read "<source>" because the <definitionName>() shared state declares no member named "<member>".
A member read is lowered into a path subscription on a declared graph node. A path the node never declares reads undefined on every render and after resume, so the code that depends on it silently does nothing.
Declare "<member>" in the state() initial value of <definitionName>(), or read a member the definition already declares.
https://markless.dev/errors/MARKLESS_SHARED_MEMBER_UNKNOWN
```

Words in angle brackets change from case to case.

## How to fix it

Start with the suggestion in the message above.

This page has no guide yet. [Help write it](/contributing/improve-these-docs).

## Where it comes from

`@markless/compiler` raises this code. Source:

- [packages/compiler/src/passes/state-lowering.ts](https://github.com/compiled-run/markless/blob/main/packages/compiler/src/passes/state-lowering.ts)

Read [how to read a Markless error](/tooling/diagnostics), or go back to [all error codes](/errors).