The following responce is received after API call:
<methodResponse> <fault> <value> <struct> <member> <name>faultCode</name> <value> <i4>-1</i4> </value> </member> <member> <name>faultString</name> <value> <string>System Error Object is not available inside a server</string> </value> </member> </struct> </value> </fault> </methodResponse>
If atm container is restarted (for example killed by OOM killer and then started by watchdog), xmlrpcd stops working and need manual restart.
The issue has been assigned ID PBA-49400 and fixed in BA version 5.5.2
As a workaround, xmlrpcd service should be restarted: