An error message is displayed while running the NetSuite item to Magento Product Add/Update flow as shown.
{“message”:”Error occurred during \”custom_attributes\” processing.Attribute \”category_ids\” has invalid value.The \”string\”value’s type is invalid.The \”int[]\” type was expected.Verify and try again.”}
This can be resolved by adding the category id in the result tab of the saved search.

Map the same field as shown.

Then the flow can be run successfully.