I could not build the ISO image but found following error. How may i fixed it?

Unmounting directory /vm/Hanthana15/tmp/imgcreate-kg0l4r/install_root failed, using lazy umount Unmounting directory /vm/Hanthana15/tmp/imgcreate-kg0l4r/install_root failed, using lazy umount lazy umount succeeded on /vm/Hanthana15/tmp/imgcreate-kg0l4r/install_root Error creating Live CD : resize2fs returned an error (1)! image to debug at /tmp/resize-image-wJsFVm sha256sum: Hanthana-15.5-i386-dvd.iso: No such file or directory