>>>Current location of the application (on the server) is c:\myappprod\
>>>The application used to reside in the folder c:\myapp but because of some issues on the server, the IT moved it to the folder c:\myappprod (added suffix 'prod').
>>>
>>>The folder c:\myapp is still on the server but when I try to go there, the access is denied.
>>>
>>>Note that in the error it does not have the current location \myappprod.
>>>
>>>How could it be that the error refers to the old location of the application?
>>
>>Maybe it reports the compile-time location?
>
>That would make sense but why it also refers to the customer server?
>
>Update: Also, the compile time folder name is different than the deployment folder name.

So I nailed it - a stab in the dark has hit the dark :).

Got another anti-bright idea: maybe what you found wasn't your error - somebody else was running it via that UNC. IOW, maybe that's not your log. Scroll down...