Hey Steve,
But it always fails.
What do you mean it always fails? What do you expect to happen? What actually happens? (Please be specific: error codes, error messages, windows showing/not-showing, etc.). What options do you have checked for the executable? Does wyUpdate show an error message?
Couple questions: 1) Is "Temporary folder" the correct place to put the files since it will no longer be needed?
Yes.
2) How can I find out specifically, why it is erring out?
It depends on the error. What's causing the error? Your batch file? Did you tell wyUpdate to rollback on error? If not, do that. Also, add logging to your batch files and/or other executables.