After upgrading environment from 7.1 to 7.5 version package server will attempt to download package Deploy.cab but will be stuck in status 'Retrying to download'.
Unable to get buffer length for SD of file '\\NSServerName\Deployment\Task Handler\Sysprep\Deploy_Cab\X86' (67)
Unable to set security for file '\\NSServerName\Deployment\Task Handler\Sysprep\Deploy_Cab\X86', Error:The network name cannot be found(67)
Error while downloading package: No package sources returned by server (0x80070490)
The xml of the package resource contains paths 'C:\Program Files\Altiris\Altiris Agent\Agents\Deployment\Task Handler\Sysprep\Deploy_Cab' which were used by Deployment Solution in 7.1 but have been changed in 7.5 to use 'C:\Program Files\Altiris\Notification Server\NSCap\bin\Deployment\Packages\Sysprep\Deploy_Cab'.
Export the xml of the problematic package.
In source type line change location from "\\NSServerName\Deployment\Task Handler\Sysprep\Deploy_Cab\X86" to "\\NSServerName\NSCap\bin\Deployment\Packages\Sysprep\Deploy_Cab\x86".