I just purchased a new version of Backup Exec and I can't remember how to get the job to overwrite all media. I have media that was from another backup software vendor, but Backup Exec doesn't seem to want to overwrite it. I have the "Overwrite media" radio button selected in the job options under the "Device and Media", but it still tells me to insert overwritable media into the drive.
Also, when it gives an error message and ejects the tape, if I click Yes, No, Cancel, it will not automatically reload the tape. I know this is possible with my LTO4 drive because my previous backup software (Yosemite) would do it. This is pretty important because I can't always be there to pull the tape out and put it back in.