TypeError: Cannot read properties of undefined n8n version 1.39.1

Questions
1

Describe the problem/error/question

After updated to n8n version 1.39.1 we receiving severals TypeError: Cannot read properties of undefined, for some workflows.
I suspect the problem is when you try use do notation to access object properties.
For instance for the error attached, the error is on this line:

Shpping: inputData.total_shipping_price_set=== null? 0 : inputData.total_shipping_price_set.shop_money===null?0:(inputData.total_shipping_price_set.shop_money.amount),

the error is:
Cannot read properties of undefined (reading ‘shop_money’) [line 105, for item 0]

I verified this data is not null, so everything is OK. but n8n report an error.

How we can fix this?

What is the error message (if any)?

{
  "errorMessage": "Cannot read properties of undefined (reading 'shop_money') [line 105, for item 0]",
  "errorDescription": "TypeError",
  "errorDetails": {},
  "n8nDetails": {
    "nodeName": "prepare Data1",
    "nodeType": "n8n-nodes-base.code",
    "nodeVersion": 2,
    "itemIndex": 0,
    "n8nVersion": "1.39.1 (Cloud)",
    "binaryDataMode": "filesystem",
    "stackTrace": [
      "TypeError: Cannot read properties of undefined (reading 'shop_money')",
      "    at /usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/Code:105:95",
      "    at /usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/Code:171:2",
      "    at VM2 Wrapper.apply (/usr/local/lib/node_modules/n8n/node_modules/@n8n/vm2/lib/bridge.js:485:11)",
      "    at NodeVM.run (/usr/local/lib/node_modules/n8n/node_modules/@n8n/vm2/lib/nodevm.js:497:23)",
      "    at JavaScriptSandbox.runCodeEachItem (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/Code/JavaScriptSandbox.js:97:45)",
      "    at Object.execute (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/Code/Code.node.js:139:40)",
      "    at Workflow.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/Workflow.js:728:42)",
      "    at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:660:68",
      "    at /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/WorkflowExecute.js:1062:20"
    ]
  }
}

Please share your workflow

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)
[workflow error](https://drive.google.com/file/d/19z-NL3WcGnwklm3lJHw8wqxGirtwZlaS/view?usp=sharing)

Share the output returned by the last node

Information on your n8n setup

  • n8n version: 1.39.1
  • Database (default: SQLite): NA
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Running n8n via (Docker, npm, n8n cloud, desktop app): Cloud
  • Operating system: Windows 11
2

Hello @ingeniux

That error means that you variable is not reachable.

With the provided example the issue could be with inputData.total_shipping_price_set that is undefined (not the same as null)

Correct format would be:

inputData.total_shipping_price_set?.shop_money?.amount || 0
3

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