I’ve had and solved the Disk Full problem. In my case, it was because the uncompressed size of the image was more than 250Mb. By uncompressed image size, I mean the size reported by Photoshop in the bottom left of the interface when you first open the image before editing. Resize the image so that it’s less than 250Gb (it shows the Mb size in the Photoshop resize window) and both Viveza 3 and Silver Efex 3 work and don’t display the error. Not ideal but it may fix your issue.