ISSUE: The specified file name in the file spec is invalid (Failed to generate the backup image of MS Windows System Backup)

1. Product Version:
ServosityPro: 5.5.8.0
OS: Windows
2. Problem Description:
When performing a MS Windows System backup, the following error message is received in the backup report:



Backup Logs  No.  Type  Timestamp  Backup Logs 1 Info YYYY/MM/DD hh:mm Start [ Windows platforms (abc123), ServosityPro 5.5.8.0 ] 2 Info YYYY/MM/DD hh:mm Start running pre-commands 3  ...  ... ... 4  Info YYYY/MM/DD hh:mm Backup MS Windows System to "Volume\WindowsImageBackup" … 5  Info YYYY/MM/DD hh:mm [MS Windows System Backup] wbadmin 1.0 - Backup command-line tool 6  Info YYYY/MM/DD hh:mm [MS Windows System Backup] (C) Copyright 2004 Microsoft Corp. 7  Info YYYY/MM/DD hh:mm [MS Windows System Backup] Retrieving volume information... 8  Info YYYY/MM/DD hh:mm [MS Windows System Backup] ERROR - The file '' is invalid. 9  ... ... [MS Windows System Backup] The specified file name in the file  spec is invalid *  Error  YYYY/MM/DD hh:mm Failed to generate the backup image of MS Windows System Backup

3. Cause:
This is a known issue with ServosityPro version 5.5.8.0. The problem is related to the 'Include all critical volumes' option in Backup Source being selected for a MS Windows System Backup set initially.
4. Resolution:

As a workaround, please: 
1. Unselect the 'Include all critical volumes' option from the affected backup set

Figure 1.0 - ServosityPro user interface (Backup setting > Backup Source)
2. Save setting


Figure 2.0 - ServosityPro user interface (Save setting)
3. Reselect the 'Include all critical volumes' option for the affected backup set afterward


Figure 3.0 - ServosityPro user interface (Backup setting > Backup Source)