If the file in question really is called "application.cfc" then that is your problem. It's supposed to be "Application.cfc".
I have a CF application that's running fine on a shared host. I now have a VPS running version of CF 9. When I try to use this on the VPS, I get the following error:
Attribute validation error for tag CFQUERY.
The value of the attribute datasource, which is currently '', is invalid.
The cause of the error is obvious. Somewhere in your application, the cfquery tag is used as follows, with an empty string as datasource:
That is a mistake. The error message should tell you where that occurs.
It'll be what Adam says - as it's linux it's case sensitive, so hasn't run your application.cfc and set the datasource.
That did it. Thank you so much!