Source List Mass Load issues

I have a list of over 4,000 material codes that need a source list created for them due to Smithfield opening up a new plant. I thought I could go into ME05 "Generate Source List" and populate the sheet accordingly, execute and save. After doing a test run I removed the check in the box for an actual execution. After saving I thought I could then return to ME01 and see the results of a sample Material code. When I go into ME01 for a specific material code / plant the line items still show blank.

Is this an enviroment Prod/Dev issue?

Is this something that may just need to sit over night and process before I can view the results in ME01?

Please help!

ME05:

Executed Transaction:

ME01: (still showing blank)