Hi apolyps3, thanks for trying to help - I think that janch is probably right here, but great that you thought of it.

Hi janch, I guess you might be right about my miserly Mio not wanting to play ball ! Unkind of it.

I tried your truck set and same problem - at least it presents as the same - 'Application Primo.exe ...').

Additional information. I tried another unlock with a different fileset someone was kind enough to upload for me. The Primo version in that set was 9.6.2.209584. It actually gets into Primo (quite slowly) and comes to a language choice screen - pressing on any of the options does not seem to register so you cannot proceed further, but it loads.

I tried messing around, taking out files like maps and dems etc to see what might happen - I then found that it produced the same error 'Application Primo.exe ...' (same as the pic I uploaded). This leads me to think that the erro may (possibly) not be a straightforward incompatibility error but something to do with licences or configuration.

I don't know if you are more familiar with the possibilities of that, maybe ?

Anyway thanks again for the time.