Thanks for your answer and your suggestion!
At first sorry, I forgot an important word: I need natural transition orbitals (NTOs) in the correct .wfn-format for Multiwfn.
I have tried egrad with $wfn $exopt 1 but it is still not the same .wfn file which I need.
Furthermore I also tried tm2molden after escf calculation, because Multiwfn normally can deal with these files and create NTOs in a .wfn-file but for this I need an additional .log- or .out-file ("Please input path of Gaussian/ORCA output file or plain text file, electron excitation information will be loaded from this file", from Multiwfn Terminal). I don't have any .log or .out file which works here.
Best regards,
_mtkt_