@Risk/DTS: "Automation error: The remote procedure call failed."

Software may lack admin rights—right-click installer → Run as administrator. Repair if prompted. Orphaned COM entries: see "Removing Outdated References to Office from the System Registry". Missing MS Visual C++ runtimes: see Palisade install guides (7.x Item 2; 6.x Items 3–5; 5.x Item 3).