The incremental backup for Monday night did not run. On logging into the backup server it prompted with a error message to insert correct media for the job. On having a look at the online media, the slot for monday's media was empty and even after running the scan/inventory did not get detected.
I had to physically go the server and have a look at it. the tape had got stuck for some reason and just on ejecting and inserting back in I could manage to do the backups.