Thanks for th quick reply. The installer on the link you sent returns and error code. It says there is "A newer version of Microsoft Visual C++ 2010 Redistributable has been detected on the machine."
Went to check and I have Visual C++ 2010 x64 Redistributable - 10.0.40219 installed.
Should I uninstall it?
Yes, try to uninstall the newer version, and install this version. You should be able to re-install the newer version after the old version is installed.
No luck! I’ve uninstalled both the x86 and x64 versions. Installed both older versions and still the same problem.
Are you installing vray_adv_20025251_rhino5_x64.exe with the size of 108MB?
Below is a screenshot of the installer you should be installing.
You could also try installing the 2008 redistributable x64:
https://www.microsoft.com/en-us/download/details.aspx?id=2092
I’m installing vray_academic_sp_20025251_rhino5_x64.exe
I’ll try the 2008 redistributable x64.
I installed the 2008 and 2005 redistributable and still doesn’t work. Any other ideas?
Thanks,
Filipe
Matt Newberg pinpointed the QtCore4.dll and QtGui4.dll as the cause of the problem. These two files were on the windows/system32 directory. Removing them from there solved the problem for Vray.
I tested out the programs I have installed on my system and found the conflicting program.
It’s a program meant to read the Portuguese National Citizen Card for document validation and signature. It’s created by some government agency.
I won’t need this program for now so I’ll try to sort this with its developers.
I tried something siple, I opened the rhino’s plugin folder, and I saw that the Vray plugin wasn’t there so I went to the chaos group’s folder, then I opened the VrayForRhino (plug-in for rhino, you se this on the details) and then open with rhino and the problem was solved 
Hey, I have also the same problem, but none of these solutions are working.
Can it be a hardware problem?
Hello, did you try to open the application for 64-bit? in my case, at first when opening the rhinoceros_5.exe the program does not show it. but when opening the rhinoceros_5 (64-bit) if it shows it. Obviously my version is more current, but I suppose it could work. Excuse me for my English, I used the google translator.
Hello Guys,
I tried everything that you tried but still V-ray is not working …
The rendering won’t start, I have the window where I can select my material but when I clik on “render” nothing happen …
I was looking for the QTCore4.dll and QtGui4.dll in the windows/system 32 but could not find them … However I found them into Rhino and solidworks program files … should I delete them ?
I Already tried to unstall and reinstall Rhino and V ray, instal all the different version of Visual C++, add the different plug in as Scarlov87 said but still Vray is not working …
If someone has an other idea which can help I would be grateful !
Hello - can you please run SystemInfo in Rhino and post the results?
-Pascal
[quote=“pascal, post:34, topic:16543”]
SystemInfo
[/quote]!
Hello Pascal, thank you for your reply.
I did not find the tool “system info” under help but I send you a screen shot of “about rhino”. Let me know if it’s what you were expected from …
Hi - your screen shot did not get attached to your message.
I take it you are running Rhino 5 - which SR are you using?
At any rate, have you contacted V-Ray support at Chaos Group? This sounds like something they would be able to help out with.
No I don’t but since I do not have any ideas anymore, I will probably contact them. I wanted to check here if people would have an other way to solve this issue.
Hello ym1,
Do not delete the QtCore4 from those directories. There can’t be any Qtcore4.dll or QtGui4.dll on windows/system32 installed by any program on your computer, because it will override the dependecies of the programs.
I have the same problem. Uninstalled the old version, and installed the new version 5.2.2 and Rhino 6. The problem is I cannot see the v-ray render icon in the menu and it won’t start. Who can help me in this?
Hi,
Just to be sure we’re on the same page here
I have the same problem
but this thread starts back in 2015 and targets a number of problems. What is yours exactly ?
and installed the new version 5.2.2 and Rhino 6
5.2.2 is the current version of the license server, not V-Ray renderer itself.
dealing with “Qt***.dll” won’t help in any way, V-Ray for Rhino is not a Qt application, it does not use those libraries
