All assets in the scene are assembly references so no standard maya referencing going on. I have turned all to locator so no scene file are loaded.
When I select the vraysettings node in the outliner i get this error…
select -r vraySettings ;
// Error: file: C:/Program Files/Autodesk/mentalrayForMaya2015/scripts/AETemplates/AEmentalrayNewMessage.mel line 91: Cannot use data of type no type in a scalar operation. //
I was not able to replicate the issue using your scene file. Tried with Maya 2015 and Maya 2015 Ext 1 and V-Ray _25041.
Do you use any additional plugins for this scene (Mentalray for an example)? If yes, try to unload them?
Maybe we can run a test using the whole scene including all reference files? Feel free to contact us via our ticket system : support@chaosgroup.com for FTP access.
Can i just ask that did you apply render settings then save the scene. Open again and see if the settings remained?
Yes, I did > Opened the scene > changed few settings for AA, GI, Render elements > saved the file (tried with just a Save and Save as..) > exit Maya > opened the file again