Dear Stefan,
We are too facing the same problem in one of our system and it doesn't allow to resize the output shows its successful but the log gives the same error.However,with the help of dbacockpit its possible to create a new one but not resize the same datasaptools and by doing this way it works but I believe that's not the solution.
It would be helpful for us if you let me know the procedure how to clean the saptools ./historical data .
Database :15.7.0.042 patch level 506
Thanks
Asim