[acrighton]

I have both Rhino V5 and V6 installed on the same workstation, and using MR 3 on Rhino 5. After installing V5 demo and had issues with it, uninstalled it but have now lost MR 3 due to license file issues. Uninstalled MR3 (including all license files) and attempted to reinstall everything and reactivate. Portal login is correct and I attempt to enter License Validation Key and it says it cannot be validated. Upon starting Rhino5, I can't run any render job as it needs a license, and get an error of "Failed to Run License Activator". After running licenseactivator.exe, and entering the correct credentials and license key, I still get the same "the license cannot be validated". I am now unable to run any render job . H.E.L.P....

[acrighton]

And some screen shots of what I'm getting...

[PA3K]

Hi Alan,
here is my similar problem viewtopic.php?f=140&t=45322&p=398335#p398335 .
Maybe it will work for You. Check Your license file folder and Your licenses on Your computer.
For me it still doesn`t work. If I want to use my V3 license, I have to uninstall all Maxwell versions and plugins (both V3 and V4) from my computer and make new installation of just V3.
Patrik

[acrighton]

Hi Patrick,

Thanks for the response, it appears V3/4/5 cannot coexist... I ended up restoring my "old" settings from a backup and now Rhino V5 and MRV3 are happily working together again, I just can't use Rhino V6 + MR for now. Maybe NL will somehow allow for different versions to coexist, V3/4 on Rhino 5 and V5 on Rhino 6?

I think something is also wrong with NL license validation, no matter how many times I input the correct credentials it would not validate.