Hi Vaclav,
did you do as mentioned by Deepak?
What is the result?
Once I had a similar problem, dbmcli just did not come back after an upgrade ... SAP told me to stop the database and to kill the processes (dbmsrv).
Than they backed up (renamed) the *.shi / *.shm files from the maxdb rundirectory (sapdb\data\wrk) and every thing went fine ...
Maybe you could try this?
Best regards
Christian