FOTA Integration with Peripheral_server_sleep

Hi ,
I am getting an error during post build steps , while trying to integrate FOTA with peripheral_server_sleep example .
AssertionError: Wrong image size in descriptor (63372/103372).

I have done these changes in my sections.ld file :
ROM (r) : ORIGIN = 0x00000000, LENGTH = 4K
FLASH (xrw) : ORIGIN = 0x00100000, LENGTH = 380K
PRAM (xrw) : ORIGIN = 0x00200000, LENGTH = 32K
DRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 72K
DRAM_BB (xrw) : ORIGIN = 0x20012000, LENGTH = 16K

Please let me know the steps to resolve this issue ,I am using “Peripheral_Server_Sleep” example from SDK 3.3.75.

Can you share the entire command line that generates the error (the posted image truncates it) and possibly the modified code so that we can investigate the cause?