Is there any way to cancel an in-process SOAP request? I accidentally added an extra 0 (no really) in my middleware platform to the number of test records I wanted to send to Sandbox. I cancelled the job in the middleware platform, but that apparently doesn't do anything to the SOAP request in NS because NetSuite is still chugging away creating these records. I'd prefer to not have to wait for hundreds of records to finish creating before I can go forward. I don't want to do more testing and send more requests while this is still in process, plus the new request would use some of the same External IDs.

You might try inactivating the integration record.