Assuming you are using the latest release ARIS 9.8 SR5, please have a look at the example "backup tenant" in chapter 5.8.2.12 Back up a tenant in the document .\Documents\English\ARIS Server Installation and Administration Guide.pdf?
You basically need to provide not only the path but rather a combination of patch + file name for your tenant backup file. Here's the example of the afore mentioned chapter:
backup tenant default to "f:\\backupDefault.acb" username=y1234 password=managery1234
The file extension could be also .ZIP, because .ACB is in fact a ZIP file format.
You have to quote "path" and better also quote username and password
Backup tenant syntax · backup tenant <tenantId> [to <pathToBackupFileOrDir>] [username = <username> password = <password>] · If <pathToBackupFileOrDir> is a directory, a file name will be chosen automatically (file extension: .acb) · If <pathToBackupFileOrDir> is not specified the backup will be placed in the ACC working directory · Paths are best put into double quotes (mandatory if a path contains blanks or special characters). · In quoted paths escape the "backslash" ("\") by doubling it (i.e. replace every "\" with "\\") or use forward slash "/" instead · Examples: · backup tenant default to "c:\\backup\\MyBackup.acb" username = system password = abc12345 · backup tenant default to "c:/path/with a/blank" username = admin password = s3cr37
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