STVD MCU Selection List Empty dao360 re-register not work anymore

Allen_Huang · ‎2026-01-04

Hi ST support team,

I'm using STVD version 4.3.12, no matter create an empty project or open the existing project.

The MCU selection in Project Setting always empty. But the same STVD installation package works in some other computers.

My computer is 64-bit x64-based processor, running Windows 11 Enterprise Version 24H2.

I tried re-register dao360.dll in administrator CMD, there was a period when it could be resolved, but I'm not sure if it was due to Windows updates or some other reason. Now it's not working anymore.

CMD command:

Regsvr32 /u "C:\Program Files (x86)\Common Files\Microsoft Shared\DAO\DAO360.DLL"

Regsvr32 "C:\Program Files (x86)\Common Files\Microsoft Shared\DAO\DAO360.DLL"

Peter BENSCH · ‎2026-01-05

Welcome @Allen_Huang, to the community!

Unfortunately, the software is no longer being developed because all resources are focused on the more modern 32-bit architecture STM32.

As you can see in the release note RN0013, section 1, STVD requires administrator rights to start. Problems may also occur in Windows 10 and Windows 11 if the path to the installation directory is too long and/or contains non-ASCII characters or spaces, so you should try installing to a short path such as C:\ST\STVD, for example.

Hope that helps?

Regards
/Peter

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Allen_Huang · ‎2026-01-06

I installed sttoolset_pack42.exe in administrator mode to in path C:\ST\STVD, also run STVD in administrator, still the same. I also tried run STVD in compatibility mode of win7,win8 also failed.

Is there any other way?

I also tried copy other computer's file DAO350.DLL, dao360.dll, DAO2535.TLB, and that computer can select MCU correctly. But still failed with my computer.

Andrew Neil · ‎2026-01-06

Another thread about problems with STVD on more recent Windows versions here.

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Allen_Huang · ‎2026-01-06

Are there any other methods besides using a virtual machine?

Andrew Neil · ‎2026-01-06

I have no idea - just sharing for info.

Perhaps @RobK1 @DarekR or @Rombersoft could help?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.