All concerns are timeout related.
The major problem is an existence of custom logic based on “User Id” which is blank for implicit open.
The minor (probably negligible) problem is SAG support response:
“OPTION OPEN_REQUIRED is recommended anyway, because without this under some circumstances inconsistencies in the database are possible.”. Documentation ADANUC section has two irrelevant for me cases when OPEN_REQUIRED could be essential - This option should be set if lnk_set_adabas_id is used when calling Adabas from application servers, and also when using Net-Work, otherwise in these cases Adabas cannot guarantee transaction integrity following an ADANUC restart. .
Do you agree that OPEN_REQUIRED will force necessity to exit/reenter natural session or alternatively sending OP command over ‘USR1043N’ to continue natural session after timeout 3009 ?