Well, in this case it’s worth a regular bug report for the corona team to look into 
Hi, the converter told me to post this here…
ErrorReport.txt (654 Bytes)
Hi, this is not quite the correct thread but anyways, the problem in your case is a very old Vray version that is not supported by the converter. If you upgrade it, it should work again
This might be only a big deal for me only but I have some complex models with a bunch of Falloff maps set to “Shadow / Light” that corona doesn’t support and render correctly. Can there be an update to the converter to convert all those Falloff maps to Fresnel instead?