3432975 - Db2 database startup reports SQL1042C & SQL1032N & SQL1641N.

db2start
02/09/2024 15:43:13     0   0   SQL1042C  An unexpected system error occurred.
SQL1032N  No start database manager command was issued.  SQLSTATE=57019

Checking the db2diag.log the above errors are also accompanied with error SQL1641N: 

2024-02-12-11.19.09.359749+060 I334524E546           LEVEL: Event
PID     : 8754                 TID : 139927971780416 PROC : db2star2
INSTANCE: db2px3               NODE : 000
HOSTNAME: alipx3ci1s
FUNCTION: DB2 UDB, base sys utilities, DB2StartMain, probe:7667
MESSAGE : ZRC=0xFFFFF997=-1641
          SQL1641N  The db2start command failed because one or more database 
          manager program files was prevented from executing with root 
          privileges by file system mount settings.
DATA #1 : <preformatted>
Db2StartMain:: sqlcode=0

2024-02-12-11.19.09.367505+060 I337191E1268          LEVEL: Event
PID     : 8752                 TID : 140418658924352 PROC : db2start
INSTANCE: db2px3               NODE : 000
HOSTNAME: alipx3ci1s
FUNCTION: DB2 UDB, base sys utilities, sqleIssueStartStop, probe:11958
DATA #1 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
 sqlcaid : SQLCA     sqlcabc: 136   sqlcode: 0   sqlerrml: 0
 sqlerrmc: 
 sqlerrp : SQL11014
 sqlerrd : (1) 0x00000000      (2) 0x00000000      (3) 0x00000000
           (4) 0x00000000      (5) 0x00000000      (6) 0x00000000
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6)    
           (7)      (8)      (9)      (10)        (11)     
 sqlstate:      
DATA #2 : SQLCA, PD_DB2_TYPE_SQLCA, 136 bytes
 sqlcaid : SQLCA     sqlcabc: 136   sqlcode: -1032   sqlerrml: 0
 sqlerrmc: 
 sqlerrp : SQLEPFIN
 sqlerrd : (1) 0x00000000      (2) 0x00000000      (3) 0x00000000
           (4) 0x00000000      (5) 0x00000000      (6) 0x00000000
 sqlwarn : (1)      (2)      (3)      (4)        (5)       (6)    
           (7)      (8)      (9)      (10)        (11)  

• IBM DB2 LUW (DB6) any release

DB2 , DB2START , SQL1042C , SQL1032N , SQL1641N , nosuid , KBA , BC-DB-DB6-DBA , Database Administration , Problem