DOP exclamation mark SOLVED

I have huge issue with Direct Offline Processing. Somehow, suddenly I can’t make any process, because I keep seeing exclamation mark with each plug in I put. I had a session on external drive, then I copied it to my computer and this error appeared. I backuped session and same problem is still on a table.
Have you guys got any clue, what can be wrong?

After whole day of milions of operations and calls, I finally solved it by myself. It looks like Nuendo HAS TO be installed on your system hard drive (C in 99% cases) even if you keep your files, folders and sessions on other drive. Other case, Windows will block your DOP actions ._.

No… but if not it’s a mess to handle it since all programs not installed to their default location need extra attention to work, regarding the rights to access system functions…