1. You installed Agent for VMware(Windows) on a Windows machine with non-English localization
2. The user account used to run Acronis services includes non-English characters in its name.
3. Backup job for ESXi virtual machine fails with with the following error:
Error code: 32771
Message: Failed to prepare for backup.
Error code: 94
Message: Failed to open virtual disk file '[Datastore] VMname/VMname.vmdk'.
Error code: 13
Message: You do not have access rights to this file
This issue is caused by a VMware problem using UTF-16 characters in pathnames. When VixDiskLib_Open() is given a pathname containing UTF-16 characters, the virtual disk library fails to find the file. On Windows 2008 for example, the pathname Temp\vmware-système\*vm* contains è as a UTF-16 character, whereas VixDiskLib expects UTF-8.
The root of the problem is in VMware - VDDK has a problem while opening a temporary directory on non-English Windows version because of the non-UTF8 characters in the path.
To resolve the issue, use the following workaround:
1. Override the Temp pathname in the configuration file by setting the tmpDirectory key, using a non-UTF-16 pathname. For this, create a file, or edit the existing file:
C:\Program Files\Common Files\Acronis\VirtualWare\VixDiskLib\vixDiskLib.config
2. Add a single line to this file
tmpDirectory = "<temp path>"
Replace temp path with a path to an existing empty directory with no UTF-16 characters, e.g. D:\Temp
3. Save changes and close the file
4. Restart Acronis Managed Machine Service service.
See also Acronis Cyber Backup: operations with a virtual machine fail with "NBD_ERR_NETWORK_CONNECT"