rgmanager could not start SAP instance

Issue

• rgmanager is not able to start SAP ERS Instance. Following message is seen in the logs

SAP_00: Cannot open Profile //XX_ERS10_XXX. (Error 2 No such file or directory) [/bas/740_REL/src/proj/ntserv/ntservmainux.cpp 1012]
FAIL: NIECONN_REFUSED (Connection refused), NiRawConSep 26 09:33:25 
rgmanager [SAPInstance] SAP Instance XXX-ERS10 start failed.
XXXX rgmanager start on SAPInstance "XXX_XXX_XXXX8" returned 1 (generic error)
XXXX rgmanager #68: Failed to start service:xxx; return value: 1
XXXX rgmanager Stopping service service:xxx

• rgmanager could not start the SAP instance resource, manually starting the SAP instance using rg_test command results in following error messages:

root@node1:/var/log/cluster # rg_test test /etc/cluster/cluster.conf status SAPInstance SAP_Instance_app1
Running in test mode.
[...]
Loading resource rule from /usr/share/cluster/lvm.sh
Loading resource rule from /usr/share/cluster/SAPInstance
Loading resource rule from /usr/share/cluster/script.sh
Checking status of SAP_Instance_app1...
<warn>   sapstartsrv is not running for instance SAP_Instance, it will be started now
[SAPInstance] sapstartsrv is not running for instance SAP_Instance, it will be started now
<error>  sapstartsrv for instance SAP_Instance could not be started!
[SAPInstance] sapstartsrv for instance SAP_Instance could not be started!
Status check of SAP_Instance_app1 failed