AIX

When I do the perform operation on machines and select mksysb for my client, I get following error

Code:

0042-229 m_bos_inst: When installing a system using mksysb as the source for the installation,
the level of the SPOT used for the installation must match the level of the mksysb image that
is being installed. The release levels of the SPOT,530spot_res,and the mksysb, mksysb_dbs113,
do not match.

NIM server os is 5300-11-01-0944
client os 5200-09-00

please suggest.

looks like the spot and mksysb versions do not match. You can create a spot from a mksysb using: smit nim_res, choose spot and then select the mksysb as "source of install images". When restoring you're mksysb choose the matching spot

Since you're using a NIM server, I'd assume you are using an lpp_source and matching spot to do upgrades. If you recently upgraded your client LPAR, you could also try re-creating your mksysb NIM object - not the actual mksysb, just the NIM object. When we upgraded from 5.3 to 6.1, I had to re-create all my mksysb NIM objects because the version of the mksysb is determined, I think, when it is created. I'm sure there is a NIM command to show the version of a mksysb, but I can't find it.

I am not upgrading doing restore

when restoring the mksysb to another type of machine, an lpp_source (of exact same version) is required.
When restoring an mksysb to the same machine only a SPOT is required.
nim -o showres 'mksysb-filename' show filesets in mksysb from which the version can be read

As you have a 5.3 NIM Server you should create the SPOT resource from the mksysb to ensure that he level of the SPOT exactly matches that of the mksysb.