Application program migration

This appendix describes factors to consider in the following migration environments:

When migrating application programs from a prior release of VTAM®.
When migrating from a single-domain environment to a multiple-domain environment
When migrating from a multiple-domain environment to a multiple-network environment (SNA network interconnection)

Simplifying migration and network upgrades describes how to avoid or minimize possible migration problems when coding new VTAM application programs.