Why Suitelet FILE Fields Cannot Be Added to Subtabs
NetSuite FILE fields must remain in a Suitelet’s main area. Here is why native subtabs and upload controls conflict, plus practical layout alternatives.
Suitelet
3 notes in this thread.
How to Read Suitelet Sublist Values After a POST
Use ServerRequest.getLineCount and getSublistValue to process submitted Suitelet rows, with notes on validation, checkboxes and NetSuite’s raw sublist encoding.
How to Stack Multiple Sublists on One Suitelet Subtab
Sharing a NetSuite tab does not make Suitelet sublists appear one beneath another. The missing piece is a shared subtab. Here is the working serverWidget pattern and its layout caveats.