Problem reverting to 1.6.6 from 2.0.2

[mab33]

Having had problems with 2.0.2 I tried to replace it with 1.6.6, but when I tried to start up the WinXP guest I got the following error:

-----------------------------------------------------------
"The selected virtual machine is inaccessible. Pleaxe inspect the error message shown below and press the refresh button to try again...

Could not load the settings file
'/home/mab/.VirtualBox/Machines/Windows XP SP3/Windows XP SP3.xml'.
Element
'{http://www.innotek.de/VirtualBox-settings} HardwareVirtExNestedPaging':
This element is not expected.
Expected is (
{http://www.innotek.de/VirtualBox-settings}PAE ). Element
'{http://www.innotek.de/VirtualBox-settin ... Properties':
This element is not expected.

Result Code:
0x80004005
Component:
VirtualBox
Interface:
IVirtualBox {2d3b9ea7-25f5-4f07-a8e1-7dd7e0dcf667}"
----------------------------------------------------------------------

Is there some way to avoid that problem, or is it really impossible to revert from 2.0.2 to 1.6.6?

Any info on how to do so would be much appreciated!

Maurice Batey (Retired in Surrey, UK)

[TerryE]

Maurice, have a look at the 1.6.6 Release Announcement in the first forum. This tells you how to fix this problem.

[mab33]

Many thanks, Terry! I can see the workaround there.

[mab33]

The workaround there says:

"Edit XML file to remove the
<HardwareVirtExNestedPaging ... > tag and the <GuestProperties> ...
</GuestProperties> block. You will then be able to open the VM in VBox
1.6.6."
In the XML file for the VM that won't boot with 1.6.6, I can see
the first tag, but the only 'Guest' entries are:

<Guest memoryBalloonSize="0" statisticsUpdateInterval="0"/>
<GuestProperties/>

Is it just the "<GuestProperties/" line that needs deleting?
Why does the 'fix' advice talk about <GuestProperties>... "block"?

[mab33]

Is it just the "<GuestProperties/" line that needs deleting?

By trial and error, I can say "Yes".

I now have 1.6.6 back to normal...

Many thanks for all help...