Error while running ./mkboot boot.img extract_img

[avid-coder05]

It gives out 4 error statements:

Unpack & decompress boot.img to ./extract_img
./mkboot: line 220: (kernel_size+page_size-1)/page_size: division by 0 (error token is "page_size")
./mkboot: line 221: (ramdisk_size+page_size-1)/page_size: division by 0 (error token is "page_size")
./mkboot: line 222: (second_size+page_size-1)/page_size: division by 0 (error token is "page_size")
./mkboot: line 223: (dtb_size+page_size-1)/page_size: division by 0 (error token is "page_size")

Please help.