FYI: mksysb can not be created from NIM during a NIM mksysb installatio
From Hajo Ehlers@21:1/5 to All on Thu Apr 20 07:27:31 2017
During the allocation of NIM mksysb images, only the file is exported to the NFS clients. However, during mksysb creation, the parent directory is also exported. If you use that filesystem to create a mksysb image of a system while another system is
restoring a mksysb image from that filesystem, you will get NFS errors
Solution:
# Export NIM_MKSYSB_SUBDIRS before creating the nim mksysb object.
export NIM_MKSYSB_SUBDIRS=yes
nim -t define -t mksysb -mk_image=yes ....