Hello Janos,
I checked SAPDBHOST parameter in DEFAULT.PFL:
SAPDBHOST = SAP-TSC
BRCONNECT is located in the directory with appropriate user rights.
Also I checked developer traces:dev_rd
LOCATION SAP-Gateway on host SAP-TSC / sapgw00
* ERROR timeout during allocate
*
* TIME Wen May 07 16:08:10 2014
* RELEASE 720
* COMPONENT SAP-Gateway
* VERSION 2
* RC 242
* MODULE gwr3cpic.c
* LINE 6070
* DETAIL no connect of TP sapxpg from host SAP-TSC.localdomain after 20
* sec
* COUNTER 11
But i can't understand why rebooting sap system the first clearing logs finish successfully, but then i have errors.