Month end processing will always be allowed to proceed if there are some procedures listed, as at period end these are 'recommended' but not 'required'. For Year end processing, all these same steps are 'required'. Until all steps are complete, the Proceed button will remain inactive.

So when you first access Year End in Adagio Payables, there is no list of procedures (such as open batches to post, posting journals to clear, or other steps)? What version of Adagio Payables is in use? Depending on the version, you will either see a drop-down field or a list of procedures, with either 'OK' or 'must complete'. What does the Year End window look like for you?

In addition to clearing each of the 5 different posting journals, you must not have any open batches (invoices, manual checks, or adjustments) and the sub-ledger batch must be retrieved into Ledger. Check these out in case one of these is the hold-up.