SwitchList, SemaphoreList file could not be written to

Hello all,

After upgrade Oracle 11 to Oracle 12C, SAP R3 integration is not working. I can backup archive logs with any problems, but when I want to backup whole databas (Util_File_Onlnie)  I got Major error:

[Major] From: OB2BAR_SAPBACK@server"<SID>" Time: 22. 10. 2015 9:15:55
SwitchList file could not be written to. Error: 2.

[Major] From: OB2BAR_SAPBACK@server "<SID>" Time: 22. 10. 2015 9:15:55
SemaphoreList file could not be written to. Error: 2.

[61:1005]  Got unexpected close from OB2BAR Backup DA on server.

I`m running DP 9 with patch bundle 4, cell server is Linux, client server is Aix 7.

Before upgrade to Oracle 12c, backup was working fine without any issue. 

Thanks