Open up your industry and stop the decision round. "Instructor|Decision Round Operations|Stop Decision Round"
Go to Instructor|Other Operations|Cancel Run
This allows you to go back 1 period at a time and you are only allowed to go back 2 periods throughout the simulation.
Then go Instructor|Decision Round Operations|Transfer To only the team who is making the corrections
Inform the team they can download the previous period to make decisions
Once they have uploaded their corrections, please do a Transfer FROM Team again, only from that specific team.
Then please check the financial audit
Go Instructor|Decision Round Operations|Run Simulation
Then go Instructor|Decision Round Operations|Transfer To All teams this time, making sure to communicate with the other teams that you have uploaded a modified team file. This is so they have the corrections made by that team and can make any adjustments to their decisions.
Finally, go to Instructor/Decision Round Operations/Start Decision Round