Sue,

Thanks for your response. Great documentation.
After a couple of hours, watching,
database_transaction_log_bytes_reserved from sys.dm_tran_database_transactions, for both transactions

0
3639948
and it remains at the same value.
database_transaction_next_undo_lsn
NULL
NULL

What  else can I do? More than 24 hours  IN RECOVERY state, no  ERRORLOG updates about this

Best  Regards