5.2.3 r119620 (Qt5.6.2): Unsupported version 20 of data unit 'vga' (instance #0, pass 0xffffffff) (VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION) -> problem due to mixing development and stable builds

[rosch]

After replacing the latest dev-build with the latest test-build 5.2.3 r119620, I'm getting the following error on Windows 10 64bits, guest Ubuntu 17.10 64bits.

Unsupported version 20 of data unit 'vga' (instance #0, pass 0xffffffff) 
(VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION).

Code d'erreur : 
E_FAIL (0x80004005)
Composant : 
ConsoleWrap
Interface : 
IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

Earlier, on the dev-build, I got the infamous

supHardenedWinVerifyProcess failed with Unknown Status -5618

error. Cf. ​https://community.oracle.com/thread/3940371

With that supHardenedWinVerifyProcessI error, I disabled my anti-virus but the issue remained.

[rosch]

Admin, could you please change the host type to Windows 10 64bits and guest to Ubuntu 17.10 64bits?

[rosch]

I restarted the host Windows 10, but the issue remained.

I then "discarded" the current state and started the vm from scratch. This time it booted up without errors.

[Michael Thayer]

I'm afraid that saved states taken with development builds are not expected to work with stable builds. This is explained on the test build page<1>, but I have changed the emphasis to make it clearer.

1. https://www.virtualbox.org/wiki/Testbuilds