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is it my conclusion correct : in beforeSubmit UE, not possible to work with sublist (selectNewLine etc)
I am trying to fill one custom sublist with external data (https response) inside beforeSubmit UE …

Look for dynamic load record, in afterSubmit you need to load the record, in beforeSubmit the record is already loaded, you can work with sublist but using different methods.

Have you checked what I mentioned in suiteanswers? Please take the time to look for dynamic records

<@U5L945PD5> are you from official NetSuite support? It seems you are :cry:,  sorry if i am wrong.
I know what is dynamic record (mode) ..
I know that....
I dont read SuiteAnswers because it is mostly useless,  like your answer.
I asked very simple question : is it possible to modify sublist inside the beforeSubmit UE script... You answered "yes you can but using different methods? What methods?

<https://netsuite.custhelp.com/app/answers/detail/a_id/45396> you need to learn how to use suiteanswer, even how to add details in questions. I am not from NetSuite Support, good luck.

```objRecord.insertLine({
    sublistId: 'attendee',
    line: 2,
   });
objRecord.setCurrentSublistValue({
    sublistId: 'attendee',
    fieldId: 'attendee',
    value: 838
   });
objRecord.commitLine({
    sublistId: 'attendee'
   });```

So, answer should be:
newrecord and oldrecord in userevent script are always in standard mode. Some of Record.method that manipulate sublist data works only in dynamic mode (like selectNewLine() )

I am going to rewrite beforeSubmit script with insertLine() instead of selectNewLine()….

<@U5L945PD5> thank you for trying to help

There you go! If you have clear the foundations, then you will be a better NetSuite Developer

you dont actually need to use insertLine unless you are actually inserting a line betwen 2 other lines

you can just use setSublistValue with the line set to whatever number the new line would be on

<@U5TF1GQ20> as usually, your answer is short and clear. Thank you.