Hi Artem,
[quote user="Artem bursuk"]Hope this is right place to ask my question.[/quote]
Yes, MicroStation Programming community is a main place where application development issues should be discussed.
[quote user="Artem bursuk"]I'm working with...[/quote]
Important information are missing: I recommend to read and follow MicroStation Programming forum best practices and to share information what MicroStation (or other application) version do you use (to specify application build number at the best case) and also what langauge and API.
[quote user="Artem bursuk"]...with DGN Platform public API[/quote]
Wha is DGN Platform public API? Do you mean C++ MicroStationAPI (which includes DgnPlatform library) available in MicroStation CONNECT Edition or something else?
With regards,
Jan