An even better alternative would be to use SQL Anywhere 16 as the consolidated database instead of ASE 15.7, but alas...

The workaround appears to be ok, but it did require all the Version 12 ml_objects to be dropped from ASE 15.7 and replaced with Version 11 ml_objects before mlsrv11.exe would function properly.

For the record, here's part 1 of the DROP order that works in the face of RI constraints...

drop procedure ml_add_passthrough_script
go
drop procedure ml_delete_passthrough_script
go
drop procedure ml_add_passthrough
go
drop procedure ml_delete_passthrough
go
drop procedure ml_add_passthrough_repair
go
drop procedure ml_delete_passthrough_repair
go
drop procedure ml_add_user
go
drop procedure ml_delete_remote_id
go
drop procedure ml_delete_user_state
go
drop procedure ml_delete_user
go
drop procedure ml_delete_sync_state
go
drop procedure ml_reset_sync_state
go
drop procedure ml_delete_sync_state_before
go
drop procedure ml_add_lang_table_script_chk
go
drop procedure ml_add_lang_table_script
go
drop procedure ml_add_table_script
go
drop procedure ml_add_java_table_script
go
drop procedure ml_add_dnet_table_script
go
drop procedure ml_add_lang_conn_script_chk
go

drop procedure ml_add_lang_connection_script
go
drop procedure ml_add_connection_script
go
drop procedure ml_add_java_connection_script
go
drop procedure ml_add_dnet_connection_script
go
drop procedure ml_add_property
go
drop procedure ml_add_column
go
drop procedure ml_share_all_scripts
go
drop procedure ml_add_missing_dnld_scripts
go
drop procedure ml_set_device
go
drop procedure ml_set_device_address
go
drop procedure ml_upload_upd_device_address
go
drop procedure ml_set_listening
go
drop procedure ml_set_sis_sync_state
go
drop procedure ml_upload_update_listening
go
drop procedure ml_delete_device_address
go
drop procedure ml_delete_listening
go
drop procedure ml_delete_device
go
drop procedure ml_qa_add_delivery
go
drop procedure ml_qa_upsert_global_prop
go
drop procedure ml_qa_handle_error
go


drop procedure ml_qa_stage_status_from_client
go
drop procedure ml_qa_staged_status_for_client
go
drop procedure ml_ra_assign_task
go
drop procedure ml_ra_int_cancel_notification
go
drop procedure ml_ra_cancel_notification
go
drop procedure ml_ra_cancel_task_instance
go
drop procedure ml_ra_delete_task
go
drop procedure ml_ra_get_task_status
go
drop procedure ml_ra_notify_agent_sync
go
drop procedure ml_ra_notify_task
go
drop procedure ml_ra_get_latest_event_id
go
drop procedure ml_ra_get_agent_events
go
drop procedure ml_ra_get_task_results
go
drop procedure ml_ra_get_agent_ids
go
drop procedure ml_ra_get_remote_ids
go

Here's part 2...

drop procedure ml_ra_set_agent_property
go
drop procedure ml_ra_clone_agent_properties
go
drop procedure ml_ra_get_agent_properties
go
drop procedure ml_ra_add_agent_id
go
drop procedure ml_ra_manage_remote_db
go
drop procedure ml_ra_unmanage_remote_db
go
drop procedure ml_ra_delete_agent_id
go
drop procedure ml_ra_int_move_events
go
drop procedure ml_ra_delete_events_before
go
drop procedure ml_ra_get_orphan_taskdbs
go
drop procedure ml_ra_reassign_taskdb
go

drop procedure ml_ra_ss_end_upload
go
drop procedure ml_ra_ss_download_prop
go
drop procedure ml_ra_ss_upload_prop
go
drop procedure ml_ra_ss_download_task
go
drop procedure ml_ra_ss_download_task_cmd
go
drop procedure ml_ra_ss_download_remote_dbs
go
drop procedure ml_ra_ss_download_ack
go
drop procedure ml_ra_ss_agent_auth_file_up
go
drop procedure ml_ra_ss_agent_auth_file_down
go
drop procedure ml_ra_ss_download_task2
go

-----------------------------------------------------------------------------------
drop view ml_connection_scripts
go
drop view ml_table_scripts
go
drop view ml_columns
go
drop view ml_qa_messages_archive
go
drop view ml_qa_messages
go



-----------------------------------------------------------------------------------
drop table ml_ra_managed_remote
go
drop table ml_ra_agent_property
go
drop table ml_ra_notify
go
drop table ml_ra_task_property
go
drop table ml_ra_task_command_property
go
drop table ml_ra_deployed_task
go
drop table ml_ra_task_command
go
drop table ml_ra_agent
go
drop table ml_ra_task
go
drop table ml_device_address
go
drop table ml_listening
go
drop table ml_passthrough_status
go
drop table ml_passthrough_repair
go
drop table ml_passthrough
go
drop table ml_column
go
drop table ml_subscription
go
drop table ml_connection_script
go


drop table ml_table_script
go
drop table ml_user
go
drop table ml_database
go
drop table ml_table
go
drop table ml_script
go
drop table ml_script_version
go
drop table ml_property
go
drop table ml_scripts_modified
go
drop table ml_primary_server
go
drop table ml_passthrough_script
go
drop table ml_device
go
drop table ml_sis_sync_state
go
drop table ml_qa_repository
go


drop table ml_qa_notifications
go
drop table ml_qa_delivery
go
drop table ml_qa_status_history
go
drop table ml_qa_global_props
go
drop table ml_qa_repository_props
go
drop table ml_qa_repository_archive
go
drop table ml_qa_delivery_archive
go
drop table ml_qa_status_history_archive
go
drop table ml_qa_repository_props_archive
go
drop table ml_qa_repository_staging
go
drop table ml_qa_status_staging
go
drop table ml_ra_schema_name
go
drop table ml_ra_event
go
drop table ml_ra_event_staging
go
drop table ml_ra_agent_staging
go