Psychopy: Psychopy 3 2020.1.1 (3.6) won't work on Windows 7 SP1

Created on 29 Feb 2020 · 5Comments · Source: psychopy/psychopy

I'm having trouble getting Psychopy 3 builder to open on my windows 7 SP1 PCs. I installed the latest standalone version; however, when I click on the builder my mouse wheel spins momentarily, then nothing happens (no error). When I try to open my experiment, there is a cmd error box that opens very briefly before closing. Attached is my the cmd error box and the system specs. Any assistance would be greatly appriciated!

P.S. I reviewed https://github.com/psychopy/psychopy/issues/2267 and these PCs don't seem to have a libmmd.dll

WinError 126

System Info

Source

Meliorategg

All 5 comments

Looks like something related to new high DPI support. Apparently the check for if the DLL is present still tries to load it (doh!).

You can prevent the error by deleting the "highDPI" line from userPref.conf, usually located in C:\Users\<user>\AppData\Roaming\psychopy3. You can also wipe it from the psychopy/preferences/Windows.spec to be extra sure it doesn't pop up again.

I pushed out a fix for this, so it should get fixed soon without needing this work around. This only affects Windows <8.1.

mdcutone on 1 Mar 2020

👍1

Thank you for your reply! I checked for userPref.conf and Window.spec, but cannot find them on my Windows 7 PCs (I found the mentioned files and code lines on my Windows 10 pc that I originally created my program on). I haven't been able to open the builder of the new version of Psychopy 3 at all, but I'll also mention that I've never attempted to use Psychopy on these PCs previously, so I don't know if these files are created after an initial successful use of the program, or if its differences in OS?

I will try the update with the fix when its made available to see if that helps. Another potential solution may be attempting to install earlier versions of Psychopy that are potentially kinder to the Windows 7 SP1 OS?

Meliorategg on 1 Mar 2020

I will try the update with the fix when its made available to see if that helps. Another potential solution may be attempting to install earlier versions of Psychopy that are potentially kinder to the Windows 7 SP1 OS?

That should work for now, the high DPI stuff was introduced in the current version. I think there might be something else going on. Thanks for the info, I'm going to look deeper into this.

mdcutone on 2 Mar 2020

Thanks @Meliorategg for reporting this and @mdcutone for fixing it. It will be included in 2020.1.3, which I'll try and push out by the end of the week.