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Issue with documentation instructions #165

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opened 2026-02-15 17:16:37 -05:00 by yindo · 13 comments
yindo commented 2026-02-15 17:16:37 -05:00
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Originally created by @KeenanFernandes2000 on GitHub (Feb 3, 2025).

I am following the instructions on https://langchain-ai.github.io/langgraphjs/tutorials/langgraph-platform/local-server/ so that I can use the cloud version of the langgraph studio to visualize my graphs and debug them. However once I reach to the " Launch LangGraph Server " stage, it keeps throwing the following error

Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'length')
at getGraphSchema (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/graph/load.mjs:68:19)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/api/assistants.mjs:86:25
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async logger2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/logger/index.js:39:5)
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async cors2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/cors/index.js:74:5)
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/server.mjs:26:5
at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17)
at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/hono-base.js:195:25

not sure what else to change since I use the pre-defined graphs when setting up the project

I am using window 11, node js v20 and langgraph js

Originally created by @KeenanFernandes2000 on GitHub (Feb 3, 2025). I am following the instructions on https://langchain-ai.github.io/langgraphjs/tutorials/langgraph-platform/local-server/ so that I can use the cloud version of the langgraph studio to visualize my graphs and debug them. However once I reach to the " Launch LangGraph Server " stage, it keeps throwing the following error Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'length') at getGraphSchema (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/graph/load.mjs:68:19) at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/api/assistants.mjs:86:25 at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17) at async logger2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/logger/index.js:39:5) at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17) at async cors2 (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/middleware/cors/index.js:74:5) at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17) at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/@langchain/langgraph-cli/dist/server.mjs:26:5 at async dispatch (file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/compose.js:30:17) at async file:///C:/Users/usr/AppData/Local/npm-cache/_npx/8b41b8d3955bcda6/node_modules/hono/dist/hono-base.js:195:25 not sure what else to change since I use the pre-defined graphs when setting up the project I am using window 11, node js v20 and langgraph js
yindo closed this issue 2026-02-15 17:16:37 -05:00
yindo commented 2026-02-15 17:16:38 -05:00
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@AmoonPod commented on GitHub (Feb 3, 2025):

I'm getting the same error.
I'm using windows 11, node js v22.12.0 and langgraph js v0.2.44.

@AmoonPod commented on GitHub (Feb 3, 2025): I'm getting the same error. I'm using windows 11, node js v22.12.0 and langgraph js v0.2.44.
yindo commented 2026-02-15 17:16:38 -05:00
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@jacoblee93 commented on GitHub (Feb 3, 2025):

Checking this out now CC @dqbd!

@jacoblee93 commented on GitHub (Feb 3, 2025): Checking this out now CC @dqbd!
yindo commented 2026-02-15 17:16:38 -05:00
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@jacoblee93 commented on GitHub (Feb 3, 2025):

Still works for me on Mac, may be Windows specific?

@jacoblee93 commented on GitHub (Feb 3, 2025): Still works for me on Mac, may be Windows specific?
yindo commented 2026-02-15 17:16:39 -05:00
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@SunnySunnyOMG commented on GitHub (Feb 3, 2025):

Saw the same issue
Windows 11, Node 20,

"@langchain/core": "0.3.37",
"@langchain/langgraph": "0.2.44",
"@langchain/langgraph-cli": "0.0.9",
@SunnySunnyOMG commented on GitHub (Feb 3, 2025): Saw the same issue Windows 11, Node 20, ``` "@langchain/core": "0.3.37", "@langchain/langgraph": "0.2.44", "@langchain/langgraph-cli": "0.0.9", ```
yindo commented 2026-02-15 17:16:39 -05:00
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@AmoonPod commented on GitHub (Feb 4, 2025):

Hi @jacoblee93, I've tested this on macOS with the same configurations, including the same versions of Node.js, npm, and all relevant packages, and it works as expected. However, the issue persists on Windows.

It seems like this might be a Windows-specific problem.

@AmoonPod commented on GitHub (Feb 4, 2025): Hi @jacoblee93, I've tested this on macOS with the same configurations, including the same versions of Node.js, npm, and all relevant packages, and it works as expected. However, the issue persists on Windows. It seems like this might be a Windows-specific problem.
yindo commented 2026-02-15 17:16:39 -05:00
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@dqbd commented on GitHub (Feb 4, 2025):

Hello! Looking into the issue!

@dqbd commented on GitHub (Feb 4, 2025): Hello! Looking into the issue!
yindo commented 2026-02-15 17:16:39 -05:00
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@AndryHTC commented on GitHub (Feb 4, 2025):

Hello! Looking into the issue!

Thanks mate :)

@AndryHTC commented on GitHub (Feb 4, 2025): > Hello! Looking into the issue! Thanks mate :)
yindo commented 2026-02-15 17:16:39 -05:00
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@dqbd commented on GitHub (Feb 4, 2025):

Hello! Released @langchain/langgraph-cli@0.0.10 with Windows fixes! LMK if the issue still persists!

@dqbd commented on GitHub (Feb 4, 2025): Hello! Released `@langchain/langgraph-cli@0.0.10` with Windows fixes! LMK if the issue still persists!
yindo commented 2026-02-15 17:16:39 -05:00
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@KeenanFernandes2000 commented on GitHub (Feb 5, 2025):

Image

Image

Yes, everything is running based on the documentation provided

Thank you @dqbd & @jacoblee93, y'all lifesavers.

@KeenanFernandes2000 commented on GitHub (Feb 5, 2025): ![Image](https://github.com/user-attachments/assets/958d7f5e-de1b-4942-b4fd-61901fcd7891) ![Image](https://github.com/user-attachments/assets/b5a1a5fa-9ecd-4a71-bd29-3b6bc8e9741f) Yes, everything is running based on the documentation provided Thank you @dqbd & @jacoblee93, y'all lifesavers.
yindo commented 2026-02-15 17:16:39 -05:00
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@AmoonPod commented on GitHub (Feb 5, 2025):

I confirm this is fixed with 0.0.10 cli version. Thank you!

@AmoonPod commented on GitHub (Feb 5, 2025): I confirm this is fixed with 0.0.10 cli version. Thank you!
yindo commented 2026-02-15 17:16:40 -05:00
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@AI3LabsX commented on GitHub (Feb 21, 2025):

For some reason I have similar issue:
Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'flags')
at getGraphSchema (
/server/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19)
a

@AI3LabsX commented on GitHub (Feb 21, 2025): For some reason I have similar issue: Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'flags') at getGraphSchema ( /server/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19) a
yindo commented 2026-02-15 17:16:40 -05:00
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@benjamincburns commented on GitHub (Feb 22, 2025):

For some reason I have similar issue: Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'flags') at getGraphSchema (file:///C:/Users/RihaR/OneDrive/Desktop/code/genie-mas/server/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19) a

@AI3LabsX I'd recommend opening a new issue for this.

@benjamincburns commented on GitHub (Feb 22, 2025): > For some reason I have similar issue: Error: Failed to extract schema for "agent": TypeError: Cannot read properties of undefined (reading 'flags') at getGraphSchema (file:///C:/Users/RihaR/OneDrive/Desktop/code/genie-mas/server/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19) a @AI3LabsX I'd recommend opening a new issue for this.
yindo commented 2026-02-15 17:16:40 -05:00
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@Synthally commented on GitHub (Feb 22, 2025):

I am also facing similar error
Error: Failed to extract schema for "cia": TypeError: Cannot read properties of undefined (reading 'length')
at getGraphSchema (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19)
at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/api/assistants.mjs:106:25
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/validator/validator.js:81:5
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/validator/validator.js:81:5
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async logger2 (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/middleware/logger/index.js:38:5)
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async cors2 (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/middleware/cors/index.js:74:5)
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/server.mjs:26:5
at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17)
at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/hono-base.js:195:25
at async responseViaResponseObject (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@hono/node-server/dist/index.mjs:351:13)

@Synthally commented on GitHub (Feb 22, 2025): I am also facing similar error Error: Failed to extract schema for "cia": TypeError: Cannot read properties of undefined (reading 'length') at getGraphSchema (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/graph/load.mjs:68:19) at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/api/assistants.mjs:106:25 at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/validator/validator.js:81:5 at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/validator/validator.js:81:5 at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async logger2 (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/middleware/logger/index.js:38:5) at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async cors2 (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/middleware/cors/index.js:74:5) at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@langchain/langgraph-api/dist/server.mjs:26:5 at async dispatch (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/compose.js:22:17) at async file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/hono/dist/hono-base.js:195:25 at async responseViaResponseObject (file:///Users/kenyally/.nvm/versions/node/v22.8.0/lib/node_modules/@langchain/langgraph-cli/node_modules/@hono/node-server/dist/index.mjs:351:13)
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