"Unable to get a temporary file name. Access is denied." during backup (4288236)

"Unable to get a temporary file name. Access is denied." during backup

Console displays "Unable to get a temporary file name. Access is denied." when trying to create a backup.

ErdServer.log will contain:

Dec 20    14:41:03.134    [4496:4876]    Error    FlsU    Failed to get temp file name in \\sharename\backupname, 0x00000005
Dec 20    14:41:03.134    [4496:4876]    Error        Throwing TSimpleException:
Dec 20    14:41:03.134    [4496:4876]    Error        Unable to get a temporary file name.
Dec 20    14:41:03.134    [4496:4876]    Error        Access is denied.
Dec 20    14:41:03.134    [4496:4876]    Error        Throwing TMcException:
Dec 20    14:41:03.134    [4496:4876]    Error        The system cannot find the file specified.
Dec 20    14:41:10.260    [5092:Main]    Error        Throwing TMcException:
Dec 20    14:41:10.260    [5092:Main]    Error        The system cannot find the file specified.
Dec 20    14:41:11.386    [4496:4876]    Error        Throwing TSimpleException:
Dec 20    14:41:11.386    [4496:4876]    Error        Unable to get a temporary file name.
Dec 20    14:41:11.386    [4496:4876]    Error        Access is denied.
Dec 20    14:41:11.495    [4496:4876]    Error        Error creating backup: Unable to get a temporary file name.
Dec 20    14:41:11.495    [4496:4876]    Error        Access is denied.

ErdServer is unable to create a temp file in specified location

Please make sure \\sharename\backupname path is available for read\write operations using account specified in scheduled task.