[Need help] Unable to execute genimage-8 tool.

[prashun07]

Hi everyone,
I have following script with name mmc.config,

image userdata.ext4 {
    name = "data"
    file {
        name = "userdata.img"
    }
}
image system.ext4 {
    name = "system"
    file {
        name = "system.img"
    }
}
image mmc.img {
    hdimage {
    }
        partition system {
        partition-type = 0x83
        image = "system.ext4"
    }
       partition data {
        partition-type = 0x83
        image = "userdata.ext4"
    }
    size=8G
}

In this script i am trying to combine userdata.img and system.img into a single image mmc.img. Both userdata.img and system.img
are kept in a input directory.
But when i try to run genimage-8 tool using command : ./genimage-8/genimage --config mmc.config
I am getting Error : file(userdata.ext4): stat(input/userdata.img) failed: No such file or directory
Can someone explain how script will search for userdata.img in genimage? are there any parameters to set path for input images?
My working directory looks like this: