The "Program Output" backup type backs up the stdout
(Standard Output) stream of any command execution. This stream data is saved as a virtual file within the backup job. You can choose the virtual file name.
The data is streamed directly to the backup destination and never touches the local disk. This has the consequence that no progress bar or ETA can be calculated or displayed during backup jobs.
If the target application produces any content on stderr
(Standard Error), it will be logged in the job report, and the final job status will not be less severe than "Warning".
If the target application exits with a non-zero error code, the error code will be logged in the job report, and the final job status will not be less severe than "Error".