2738625 - SUM - Update Failing in Phase MAIN_NEWBAS/STARTSAP_TBUPG, StartWait FAIL: Timeout

When you update/upgrade with SUM, at phase MAIN_NEWBAS/STARTSAP_TBUPG, you find errors in SAPup.ECO similar as below:

EXECUTING <instance directory>\exe\sapcontrol.exe -prot PIPE -host <hostname> -nr <instance number> -function StartWait 300 10

30.12.2018 07:59:52
Start
OK

30.12.2018 08:05:02
StartWait
FAIL: Timeout

EXECUTING <instance directory>\exe\sapcontrol.exe -prot PIPE -host <hostname> -nr <instance number> -function GetProcessList

1 starttime: 2018 12 30 01:39:58
1 elapsedtime: 0:05:29
1 pid: 13900
2 name: disp+work.EXE
2 description: Dispatcher
2 dispstatus: YELLOW
2 textstatus: Request handling without progress

And then when you manually execute sapcontrol command "EXECUTING <instance directory>\exe\sapcontrol.exe -prot PIPE -host <hostname> -nr <instance number> -function GetProcessList", you can successfully receive result "disp+work.EXE, Dispatcher, GREEN, Running, 2018 12 31 01:46:17, 5:25:31, XXXX"

Systems based on Netweaver

MAIN_NEWBAS/STARTSAP_TBUPG, StartWait FAIL: Timeout, Startwait, fail:timeout, SAPup.ECO, /sapcontrol/timeout_sec/abap , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-CST-STS , Startup Service , Problem