I should be able to pull up a search record with this script below right? I’m getting an error code: “INVALID_SEARCH”, details: “That search or mass update does not exist.” var search = nlapiSearchRecord(null, ‘customsearch537’); I’ve tried both the internal ID and the external ID. Is there anything else I should try?

You need to check the permissions for the search and it works with both internal and external id(s). Also, I prefer to use: var search = nlapiLoadSearch(null,'customsearch537');