.dcx files are not always generated and if your report file requires a dcx file that is not present then you only option is to create a new report.

Did you look at the references I mentioned? Are they there? Were they selectable?
If not then did you check for the files I mentioned?

Sounds like one or both of those dlls is not installed/registered properly or has became corrupted or registry corruption on the trouble pc

If the files are present I would suggest that you try to register them and see if that helps.