I had replacing 5120 on RB112 n tried to netinstall

here was the process
MikroTik 2.9.20 <<<< these boot ok
Elka-Mertilang Login:<<<< forgot the password

RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup.

RouterBOOT-2.2
What do you want to configure?
d - boot delay
k - boot key
s - serial console
o - boot device
u - cpu mode
r - reset configuration
e - format nand
g - upgrade firmware
i - board info
p - boot protocol
t - do memory testing
x - exit setup
your choice: o - boot device

Select boot device:
e - boot over Ethernet
* n - boot from NAND, if fail then Ethernet
1 - boot Ethernet once, then NAND
o - boot from NAND only
b - boot chosen device
your choice: e - boot over Ethernet

RouterBOOT-2.2
What do you want to configure?
d - boot delay
k - boot key
s - serial console
o - boot device
u - cpu mode
r - reset configuration
e - format nand
g - upgrade firmware
i - board info
p - boot protocol
t - do memory testing
x - exit setup
your choice: x - exit setup


writing settings to flash...

RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup..
trying bootp protocol.......... OK
Got IP address: 192.168.2.250
resolved mac address 00:0A:E4:ED:E8:79
transfer started ************************************.*************************s
setting up elf image... OK
jumping to kernel code


Welcome to MikroTik Router Software remote installation
Press Ctrl-Alt-Delete to abort

mac-address: 00:0C:42:08:41:24

software-id: 75ND-3TT key:
EDITg6lacOpTdJO1vXyZ9ohOVzfaEQr35HkV1ZiYzPCfiewKpKYcJTemOzZ1xi/b6UbTUK5VeJl2ASx=

Waiting for installation server...
Found server at 00:0A:E4:ED:E8:79

Formatting disk.....

ERROR: installation of routeros-rb500-2.9.50 failed: could not create lib/mobriy
WARNING: package system-2.9.50 onuninstall script failed<<<< doesNOT allow to write to NAND

Press ENTER to reboot


RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup..
trying bootp protocol...... OK
Got IP address: 192.168.2.250
resolved mac address 00:0A:E4:ED:E8:79
transfer started ***************************************.**********************s
setting up elf image... OK
jumping to kernel code


Welcome to MikroTik Router Software remote installation
Press Ctrl-Alt-Delete to abort

mac-address: 00:0C:42:08:41:24

software-id: 75ND-3TT key:
EDITg6lacOpTdJO1vXyZ9ohOVzfaEQr35HkV1ZiYzPCfiewKpKYcJTemOzZ1xi/b6UbTUK5VeJl2ASx=

Waiting for installation server...


RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup.

RouterBOOT-2.2
What do you want to configure?
d - boot delay
k - boot key
s - serial console
o - boot device
u - cpu mode
r - reset configuration
e - format nand
g - upgrade firmware
i - board info
p - boot protocol
t - do memory testing
x - exit setup
your choice: r - reset configuration


writing settings to flash...

RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup..
kernel not found
trying bootp protocol..........................................................d
kernel loadin

RouterBOOT booter 2.2

RouterBoard 112

CPU frequency: 175 MHz
Memory size: 16 MB

Press any key within 2 seconds to enter setup..
kernel not found<<<<my bad process as previously seen
trying bootp protocol..........................................................K
Got IP address: 192.168.2.250
resolved mac address 00:0A:E4:ED:E8:79
transfer started *************************************.************************s
setting up elf image... OK
jumping to kernel code


Welcome to MikroTik Router Software remote installation
Press Ctrl-Alt-Delete to abort

mac-address: 00:0C:42:08:41:24

software-id: 75ND-3TT key:
EDITg6lacOpTdJO1vXyZ9ohOVzfaEQr35HkV1ZiYzPCfiewKpKYcJTemOzZ1xi/b6UbTUK5VeJl2ASx=

Waiting for installation server...
Found server at 00:0A:E4:ED:E8:79

Formatting disk.....

WARNING: ghost file /
ERROR: installation of routeros-mipsle-3.11 failed: could not create : File exis
WARNING: package system-3.11 onuninstall script failed

Press ENTER to reboot


anyway to help, please

what is these error meant "onuninstall script failed"

success.. to upgrade to 3.30


step to do: install ROS to mem(soldering) from other board