I did install IRP for a client without PM (v2022, back in summer of 2023), and it was complicated. (They used MRP's projected demand for use with SIA, and we translated that to IRP's projected demand tables to make things easier for SIA to read).
Basically I had to install PM (which automatically installed IRP), and then uninstalled PM. The license keys were also a nightmare, taking weeks to get the support ticket escalated and resolved (involving Linda Raby). In the end they added one PM license (after learning I already uninstalled PM) to make the IRP registration error message disappear... and I warned the customer they should not be paying for PM. Sage simply didn't plan for users to want IRP without PM... but perhaps they fixed things since then.
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Kevin Moyes
Technical Systems Analyst
Munjal White Consulting Co.
Toronto ON
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