I asked before but still didn't get any idea of a solution: In suiteQL how can I get custom field of inventory number ? the field is store value and there is no permission issue, When I try to get all the fields in inventory number record I don't get any custom fields there.

It may be that custom inventory number fields are not yet supported?? I recently helped a client work through an issue with custom address fields in a SOAP call, and NetSuite finally responded that getting the custom fields was not supported. Do you see the custom fields in your Records Catalog?

@David Na What is the field id and table name of what you are trying to query with SuiteQL?

table name is InventoryNumber, field id is a any custom item number field I have.. no matter what.