2190525 - Errors 10330 and 10351 when guest user is missing in sybsystemprocs - SAP ASE

• Receiving the following error when executing a system stored procedure as a non-sa user:

sp_mda
go
Msg 10330, Level 14, State 1:
Server 'xxx', Procedure 'sp_mda':
EXECUTE permission denied on object sp_mda, database sybsystemprocs, owner dbo
(return status = -4)

• Also a non-sa user is not able to switch to the sybsystemprocs database:

use sybsystemprocs
go
Msg 10351, Level 14, State 1:
Server 'xxx', Line 1:
Server user id 14 is not a valid user in database 'sybsystemprocs'

SAP Adaptive Server Enterprise  (ASE) 15.5 

sp_adduser , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem