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Hi, I am wondering can I not really get the value of a parameter if I don't set preference on my script deployment parameters?

If you dont set the parameter then whatever the parameter is set to on the script deployment will be what you get from the getParameter function

Ok, I made some few changes. But my problem now is, it dont accept my json value as default value.

The preference is used to determine where the parameter should be set

*Company* = One parameter is set for the whole company in <https://system.netsuite.com/app/setup/general.nl?whence=|general settings> &gt; Custom preferences

*User* = Each user sets the parameter in their <https://system.netsuite.com/app/center/userprefs.nl?sc=-29&amp;whence=|user settings>

*No Preference =* The parameter is set on the script deployment

<@U016SFWFHGC> if you want to set a text field to json the you need to JSON.stringify(myJsonObject)

When you read the field you then need to call the JSON.parse(myText) as well