Error when launching Dorico 6.2

Hi, when launching Dorico 6.2 after installation, I get this :

I would try uninstalling and reinstalling - it looks like one of the DLLs that Dorico uses hasn’t been installed correctly.

I did reinstall with SDM. No change.

Instead of doing a Reinstall in SDM, do an Uninstall from the Windows app list. Then double-check there are no files left in C:\Program Files\Steinberg\Dorico6 - delete them if there are. Then you can Install again from SDM.

Is there ever a way to improve this extremely tedious process of updating Dorico? I have had Dorico since the beginning and have complained about this issue so many times: Download Assistant (why??), Activation Manager (why??), and, to add pain to misery, each one needs to be updated every time. Now I am waiting for the update of the “Infamous Download Manager.”1 hour and running. Such a lovely software, and such a tedious update process. I have a new Mac Mini, good internet, and I am pretty decent with computers. By far the worst updating software I have ever encountered. And although there have been countless complaints, nothing has changed, probably never will. Such a waste of precious time, if Dorico weren´t awesome software, I would have dumped it a long time ago. I could apologize for being so blunt, but I just can´t.

I did all of these. Same issue…

In that case could you try downloading from here instead of using SDM: Dorico 6 Downloads | Steinberg

Done. Same issue…

I finally uninstall, reboot, reinstall and it works now. Thanks for your help !

@Richard_Lanyon For your information, it happened to me this morning — right after a brief Windows Security popup saying that an app would only be partially usable, or something like this (was too quick to take a screenshot)

But I checked and nothing was showing up in the Windows protection history… I tried Dorico 5 which launched normally.

I rebooted the computer, same thing. Then, after a few attempts (I’m not exactly sure what I did), it finally worked, without resintalling anything…



I tried updating today. I got the same error. Has anyone solved it?

yes, uninstall, reboot, reinstall.


Dorico 6 setup failed. The product installation source is not available. Please verify that the source exists and can be accessed. Error code 1612.


This is the message I get whether I try to update or uninstall

You clould try downloading directly from here Dorico 6 Downloads | Steinberg

A Google search on error code 1612 yields following:

Error code 1612 indicates that the installation source for a product is unavailable, meaning Windows cannot find the cached .msi file required to update, repair, or uninstall software. This often happens when the C:\Windows\Installer cache is cleared by cleaning tools. Solutions include repairing the installation via Control Panel, using the Microsoft Install/Uninstall Troubleshooter, or performing a clean reinstall.

Key Solutions for Error 1612

  • Run Microsoft Program Install and Uninstall Troubleshooter: This is the most effective method, as it can fix corrupted registry keys that block program removal.

  • Use the Original Installer: If you are updating/uninstalling, the system may ask for the original .msi package file that was used during the initial installation.

  • Repair via Control Panel: Go to Control Panel > Programs and Features, select the software, and choose “Repair” if available.

  • Clear Temp Folder: Type %TEMP% in the Windows search bar, delete all files in the folder, and try the installation again.

  • Perform a Clean Uninstall: If the program cannot be removed, you may need to manually remove remnants of the software or use a third-party uninstaller.