Hi, We are trying to create a vendor bill from existing purchase order using suitescript N/record module. Following is the code:

var vendorBill = recordModule.create({
            type: recordModule.Type.VENDOR_BILL,
            isDynamic: true,
            defaultValues: {
                entity: supplierId
            }
        });
vendorBill.selectNewLine('item');
vendorBill.setCurrentSublistValue('item', 'orderdoc', poId);
vendorBill.setCurrentSublistValue('item', 'orderline', poLineId);
                
vendorBill.commitLine('item');
vendorBill.save({
			enableSourcing: false,
			ignoreMandatoryFields: true
		});

This above code is written in a restlet and when we invoke it from postman, we get :

{
  "type": "error.SuiteScriptError",
  "name": "YOU_CANNOT_ADD_MULTIPLE_VENDORS_ANDOR_CURRENCIES_TO_A_SINGLE_VENDOR_BILL",
  "message": "You cannot add multiple vendors and/or currencies to a single Vendor Bill.",
  "id": "",
  "stack": [
    "anonymous(N/serverRecordService)",
    "postBill(/SuiteScripts/new_post_transaction.js:1402)",
    "doPost(/SuiteScripts/new_post_transaction.js:641)"
  ],
  "cause": {
    "type": "internal error",
    "code": "YOU_CANNOT_ADD_MULTIPLE_VENDORS_ANDOR_CURRENCIES_TO_A_SINGLE_VENDOR_BILL",
    "details": "You cannot add multiple vendors and/or currencies to a single Vendor Bill.",
    "userEvent": null,
    "stackTrace": [
      "anonymous(N/serverRecordService)",
      "postBill(/SuiteScripts/new_post_transaction.js:1402)",
      "doPost(/SuiteScripts/new_post_transaction.js:641)"
    ],
    "notifyOff": false
  },
  "notifyOff": false,
  "userFacing": false
}

Please help.

Are you able to create the same vendor bill for that purchase order through UI? On an unrelated note, did you try record.transform api to create that vendor bill ?