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ISSUE: Cannot backup data on network path if folder name contains pound sign (#) at the start (for client on Windows 10, version 1803)

Article ID: 5343
Reviewed: 06/07/2018

Product Version:
AhsayACB / AhsayOBM: or above
OS: Windows 10, version 1803

Problem Description

After patching Windows 10 to version 1803, when performing a backup for data on network path with pound sign (#) at the start of a folder name (e.g. #folder), folders that are listed afterward, cannot be detected properly.

For example, if the backup source contains:

Data in folder_b and folder_c cannot be backup.

For initial backup job (after patching Windows 10 to version 1803), the AhsayOBM / ACB client agent will not backup data in folder_b and folder_c.

For sub sequence backup job (after patching Windows 10 to version 1803), the AhsayOBM / ACB client agent will detect the data in folder_b and folder_c as deleted data (e.g. moving all data to retention).

Important: This issue will only affect Windows 10, version 1803


This is a known issue with AhsayOBM / ACB installation on Windows 10, version 1803.


To resolve the issue, patch the affected AhsayOBM application to version or above.  The instructions can be found by Clicking Here.

To undelete the data that were incorrect detected as deleted file by the client application, please refer to the steps provided in the following articles:

FAQ: How to un-delete backup data that were moved to retention unintentionally


windows, network, nas, undelete, un-delete, delete, cannot, obm, acb

public/5343_cannot_backup_unc_path_with_pound_sign_win10_v1803.txt · Last modified: 2018/07/05 15:25 by edward.chan