Altec provides a set of tools that uses BOI to push AP invoices or Purchase Orders directly into Sage 100 with out VI.
We have had problems in the past with Smart Link due to speed issues with BOI calling the Altec web tools. Smart LInk runs from Sage 100 and calls Doclink to pull data from providex.
The GL Smart form works from doclink and pushes data into providex using the BOI interface and is both faster and more efficient. In a recent implementation, we had to pull the resident BOI / Providex expert @AlnoorCassim in to help resolve a configuration issue in Sage 100 that caused some problems. I don't recall the details but in the end, Alnoor spent 2 hours searching and finally found a config setting that wasn't set properly by the Sage 100 installation routine. Once corrected, the GL Smart Form or GL Stamp started working like a champ.