After upgrading Gen there maybe block mode application screen problems at generation or runtime e.g.
Screen Problems:
Error Messages (Generator and Runtime):
CGB0076S Associated SCRPOCC object, id=2118253016, not found in index.
CGB0033S Probable model corruption. Check model for errors and correct.
CGB0003E Exception condition GBEX_TERMINATE has been raised.
TIRM003E: INPUT AT CURSOR DOES NOT MATCH DEFINED PATTERN
Generator Messages
Runtime Messages > Common Runtime Messages TIRM000E - TIRM599E
Release: 8.x
Gen Host Encyclopedia Construction
Check the screen map setting.
The global default setting is Enhanced. It can be changed in PARMLIB member TIRHE with the parameter TIMAPSEL.
To resolve the screen problem, change the screen map from Enhanced to Standard OR from Standard to Enhanced on the "Screen generator options" panel from the "Application System Construction Menu".
Regenerate the screen and dialog manager and retest.
Host Encyclopedia Construction > Installation in the HE Environment > Other Considerations and Construction Options - see section "Construction Options" and sub-section "Screen Generator Options" at bottom of the page.
Related article Gen Host Encyclopedia Screen Generation Standard and Enhanced Map options explains more about the 2 map settings and also in the Additional Information section it shows the difference in the generated code for each option. So, outside of the HE itself, that is another way to compare if the same map option has been used before and after the upgrade i.e. compare the generated screen code members for each version.