Hello Renjith:
The MK10DX128VLH7 does not support swap feature.
:smileyinfo: The condition for a Kinetis K device to support swap feature, is to have *at least* 2 program flash (P-Flash) memory blocks, disregarding of Flex Memory.
Here are some examples:
:smileycheck: MK60DN512 <- 2 x 256 KB p-flash blocks. Supports swap.
:smileycheck: MK60FX512 <- 2 x 256 KB p-flash blocks. Supports swap and has Flex memory.
:smileycheck: MK60FN1M0 <- 4 x 256 KB p-flash blocks. Supports swap.
:smileyx: MK60DX256 <- 1 x 256 KB p-flash block. No swap support.
I hope this clarifies your doubt.
Regards!
Jorge Gonzalez