2386226 - Backup on Multi Tenant Database using third party tool failed

The backup works for the SYSTEMDB, but not on a Tenant DB.

Error:
* 447: backup could not be completed: [110505] Backint fork failed, $sysmsg$ ($sysrc$). Invalid PID SQLSTATE: HY000

[138641]{-1}[-1/-1] 2016-10-10 16:12:36.653111 i Daemon TrexDaemon.cpp(02337) : starting program at '/usr/sap/XXX/SYS/global/hdb/opt/hdbbackint' with args ''
[138641]{-1}[-1/-1] 2016-10-10 16:12:36.653117 e Daemon Main.cpp(00940) : executable '/usr/sap/XXX/SYS/global/hdb/opt/' is not in the list of allowed paths
[138641]{-1}[-1/-1] 2016-10-10 16:12:36.653120 e Daemon Main.cpp(00944) : all allowed paths:
[138641]{-1}[-1/-1] 2016-10-10 16:12:36.653122 e Daemon Main.cpp(00949) : /usr/sap/XXX/HDB01/exe/
[138641]{-1}[-1/-1] 2016-10-10 16:12:36.653123 e Daemon Main.cpp(00949) : /hana/shared/XXX/HDB01/exe/

SAP HANA DB Version 1.00.112.00

database_isolation = high, backint, symantec, netbackup, SYSTEMDB. , KBA , HAN-DB-BAC , SAP HANA Backup & Recovery , Problem