7zip compression error

We are receiving the following error when we use 7-zip compression method, but not when we use zip compression method.

5/23/2018 1:54 PM Starting job "Backup Job - 1 " - “Full”. Computer “SEMS-TS01”. App v.“11.6.3”
5/23/2018 1:54 PM The backup folder “K:\Backup\Pranas.NET\SQLBackupAndFTP\backup” has “43.547GB” free space. The temporary folder “K:\Backup\Pranas.NET\SQLBackupAndFTP\backup” has “43.547GB” free space
5/23/2018 1:54 PM Backing up “olhesql\sems” LocalSqlServer databases
5/23/2018 1:54 PM Getting maximum file size…
5/23/2018 1:54 PM The maximum file size: “”
5/23/2018 1:54 PM Backing up “kern” database to .bak file. Backup type: “Full”. Checksum: “Disabled”
5/23/2018 1:54 PM “kern” database backup successfully completed. Backup type: “Full”
5/23/2018 1:54 PM Database “kern” successfully backed up to “kern201805231354.bak : 153.251MB”
5/23/2018 1:54 PM Compressing “kern201805231354.bak” file with 7zip archiver. Encryption: “Off”
5/23/2018 1:54 PM Failed to backup “kern” database with “Full” backup type: 7-zip archiver error. > Could not find a part of the path ‘K:\Backup\Pranas.NET\SQLBackupAndFTP\backup\kern201805231354.bak’.
5/23/2018 1:54 PM Cleaning up backups of "Backup Job - 1 " job
5/23/2018 1:54 PM Job "Backup Job - 1 " finished with “1” errors

does anyone know what would cause this?

Hi Jason,

To investigate this case we need more details. Could you please enable the advanced log, reproduce the issue and send logs to developers. Please find more details on how to do it at https://sqlbackupandftp.com/blog/how-to-send-log-to-developers

Sorry for the inconvenience.

sending the logs seems to fail. I was able to grab the log files. is there somewhere I can manually upload them?

Could you please send the logs directly to our support team - support@sqlbackupandftp.com

Sorry for the inconvenience.