z/OS 1.13 is coming out, so the question is what, if any, maintenance may be required for OMEGAMON in a z/OS 1.13 environment? The good news is OMEGAMON currency support for z/OS 1.13 is provided for Version 410, 420 and later releases of OMEGAMON XE z/OS products.
Here's a link to a document that lists what, if any, OMEGAMON maintenance is required. Here's the link:
By the way, if you are interested in z/OS 1.12 maintenance, here's a link for that, as well: