Extension Pack installation helper version mismatch error

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fbb07
Posts: 2
Joined: 13. Nov 2021, 20:45

Extension Pack installation helper version mismatch error

Post by fbb07 »

I installed VirtualBox Version 6.1.26_Ubuntu r145957 on my linux host running Ubuntu 21.10. I attempted to install the extensions pack by going to Preferences - Extensions, then selecting the extension pack (Oracle_VM_VirtualBox_Extension_Pack-6.1.28.vbox-extpack). The first screen reports that it will be installing Extension Pack version 6.1.28r147628. However, during the installation it gives the following error:

Failed to install the Extension Pack <redacted>/Oracle_VM_VirtualBox_Extension_Pack-6.1.28.vbox-extpack.

VBoxExtPackRegister returned VERR_VERSION_MISMATCH, pReg=0000000000000000 ErrInfo='Helper version mismatch - expected 0x30000 got 0x3'.

Result Code: NS_ERROR_FAILURE (0x80004005)
Component: ExtPackManagerWrap
Interface: IExtPackManager {70401eef-c8e9-466b-9660-45cb3e9979e4}

I only saw this one version of the extension pack on the VirtualBox website. Does anybody know of a fix or workaround for this?
scottgus1
Site Moderator
Posts: 20965
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows, Linux

Re: Extension Pack installation helper version mismatch error

Post by scottgus1 »

fbb07 wrote:I installed VirtualBox Version 6.1.26_Ubuntu
That's the fork of Virtualbox distributed by Ubuntu. We don't know how the fork works, unfortunately, so you'd have to ask Ubuntu, or uninstall the fork first, handle the prerequisites https://www.virtualbox.org/manual/ch02. ... nux-prereq, then install the official version https://www.virtualbox.org/wiki/Linux_Downloads
fbb07 wrote:VirtualBox Version 6.1.26_Ubuntu
(Oracle_VM_VirtualBox_Extension_Pack-6.1.28.vbox-extpack)
returned VERR_VERSION_MISMATCH
Extension Pack version must match Virtualbox version. Use 6.1.26 EP https://www.virtualbox.org/wiki/Download_Old_Builds_6_1
fbb07
Posts: 2
Joined: 13. Nov 2021, 20:45

Re: Extension Pack installation helper version mismatch error

Post by fbb07 »

This worked for me. However, I wasn't successful at moving my virtual machine image to 6.1.28. Thankfully I didn't have much installed on it, so I created a new image from scratch. Thanks for the help!
scottgus1
Site Moderator
Posts: 20965
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows, Linux

Re: Extension Pack installation helper version mismatch error

Post by scottgus1 »

Great! Glad you're up and running.
fbb07 wrote:I wasn't successful at moving my virtual machine image to 6.1.28. ... I created a new image from scratch
Almost always, VMs survive a Virtualbox version change. Upgrades and failed upgrades with a revert to previous version, are OK. Downgrades are also OK as long as one doesn't go back to when certain virtualized hardware didn't exist (like the VboxSVGA and VMSVGA video cards, which didn't come out until 6.0).
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