Error logs are very useful when troubleshooting issues. The Oasis Support Team will usually ask a user for all of the logs from the day the error occurred. Here are some operating system specific links to explain how to retrieve the OASIS log files for troubleshooting.
If you are still unable to find the Log files, you can get a direct link to them from: Help->Optimize OASIS, then scroll down to User Directory and click the link for OASIS Default Boot Directory. This will take you to the folder that has the .oasis folder.