How to fix this error in my scheduled script?

{
  "type": "error.SuiteScriptError",
  "name": "UNSUPPORTED_DATA_FORMAT",
  "message": "You have supplied an invalid value for data format: JSON: The content of elements must consist of well-formed character data or markup.",
  "id": "",
  "stack": [
    "Error\n at Object.report (/SuiteScripts/Scheduled Script/ss_fbsg_notify_pochanges_on_solines.js:60:13)"
  ],
  "cause": {
    "type": "internal error",
    "code": "UNSUPPORTED_DATA_FORMAT",
    "details": "You have supplied an invalid value for data format: JSON: The content of elements must consist of well-formed character data or markup.",
    "userEvent": null,
    "stackTrace": [
      "Error\n at Object.report (/SuiteScripts/Scheduled Script/ss_fbsg_mysscript.js:60:13)"
    ],
    "notifyOff": false
  },
  "notifyOff": false,
  "userFacing": true
}

The erroring line in the code is this:

tRenderer.addCustomDataSource({alias: "poChangesBySo", format: render.DataSource.OBJECT, data: JSON.parse(JSON.stringify(poChangesBySo))});

I have tried making it a JSON string, and I have tried leaving it as a Javascript object, and I have tried stringifying the object and re-parsing it into a JSON string, and I think I did all these with render.DataSource.OBJECT and render.DataSource.JSON poChangesBySo is initialized as a Javascript object:

let poChangesBySo = {};

It is populated inside an iterator over search results:

poChangesBySo[soResult.id] = {
				salesOrder: JSON.parse(JSON.stringify(soResult)),
				lines: poResults.filter(po => {
					return soResult.getValue({name: "applyingtransaction"}) ==	po.id;
				}).map(po => JSON.parse(JSON.stringify(po)))
			};

So it is an object, not an array, and not a string when I use render.DataSource.OBJECT.

AI generated answer (using internal Slack threads):

The error you're encountering is due to the fact that the

addCustomDataSource

method expects an object, not an array or a string. When you use

JSON.stringify()

, it converts the object into a string, which is not a valid input for this method. Similarly, passing an array directly is also not valid. The solution is to wrap your array inside an object. Here's how you can modify your code:

javascript
tRenderer.addCustomDataSource({
    alias: "poChangesBySo", 
    format: render.DataSource.OBJECT, 
    data: { 'poChangesBySo': JSON.parse(JSON.stringify(poChangesBySo)) }
});

In this code,

poChangesBySo

is an array that is wrapped inside an object. This way, you're passing an object to the

addCustomDataSource

method, which is the expected input. Remember, when you're referencing this data in your template, you'll need to use the

alias.property

format. In this case, it would be

poChangesBySo.poChangesBySo

. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******