SUM Tool gives SIDADM credentials wrong

Issue

Sum tool gives error " The provided sidadm credentials are either incorrect "

Reason:

An OS user that can be verified is required for authentication on the

target host on which the SAP instance runs. If the user/password check was successful, the system checks whether the user has execute rights for the file sapstartsrv.exe (Windows) or write authorization for the file

sapstartsrv (non-Windows platforms). If this is the case, the required

operation is executed. Thus, you can set the access to the protected

operations with greater precision by setting the file access

authorizations.

Some mechanisms have been introduced on other operating systems that only allow a password check for certain users with root rights (for example,

shadow passwd). Sapstartsrv cannot generally verify users of this type.

To work around these restrictions on the UNIX platforms, we introduced an

authentication in sapstarstrv using the external help program sapuxuserchk.

However, the installation or the upgrade and sapcpe cannot set the s-bit automatically.

Therefore, this must be performed manually in every executable directory.

Resolution:

Execute following commads where sapuxuserchk available.This will 

chown root:sapsys sapuxuserchk

chmod u+s,o-rwx sapuxuserchk

If appying on central instance change permission at following locations.

/usr/sap/SID/DVEBMGS00/exe

/usr/sap/SID/SCS01/exe

Reference

SAP Note : 927637