From 31be7e817f5fcc21d624e778008cbd9ad8a3f72a Mon Sep 17 00:00:00 2001
From: Matthew Goodfield <142009224+gdfldm@users.noreply.github.com>
Date: Tue, 4 Nov 2025 14:15:34 +0000
Subject: [PATCH] Use FIPNUM for RT* summary vectors

---
 opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp b/opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
index 014fffe2af2..28edac866f6 100644
--- a/opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
+++ b/opm/input/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
@@ -1084,7 +1084,7 @@ establishRegionContext(const DeckKeyword&       keyword,
 {
     auto region_name = std::string { "FIPNUM" };
 
-    if (keyword.name().size() > 5) {
+    if (keyword.name().size() > 5 && keyword.name().substr(0, 2) != "RT") {
         region_name = "FIP" + keyword.name().substr(5, 3);
 
         if (! field_props.has_int(region_name)) {