VBoxManage error without a message

[TheSneak]

I am trying to set the bios system time offset using the following command...

Code: Select all

"C:\Program Files\Oracle\VirtualBox\VBoxManage" modifyvm "Windows 8" --biossystemtimeoffset -10*24*60*60*1000

However, when I run this command the output is:

Code: Select all

Oracle VM VirtualBox Command Line Management Interface Version 4.2.6
(C) 2005-2012 Oracle Corporation
All rights reserved.

Usage:

VBoxManage modifyvm         <uuid|name>
                            [--name <name>]
                            [--groups <group>, ...]
//trimmed for brevity//
                            [--autostart-enabled on|off]
                            [--autostart-delay <seconds>]

VBoxManage.exe: error:
D:\Virtual Machines\Windows 8>

That's it! There is no error message provided. Just the statement that there was an error. I'm stuck trying to make this work.

[noteirak]

have you tried giving the final number instead of doing the calculation there?

[TheSneak]

Thanks. That works.