The miner is able to log everything in output to a file, but this is not activated by default. You would need to define this at execution, like this:
amdxmrminer.exe <OTHER COMMANDS> –logfile <amdxmrminer.log>
Shorten command: -lf <yourfile>
This will ensure that AMD XMR Miner will try to write to the file amdxmrminer.log. This filename can be changed to whatever you would like.