From 9624eb7185aa518a54b99ccfeef655fedd5615df Mon Sep 17 00:00:00 2001
From: Antonella Ritorto <anto.ritorto@gmail.com>
Date: Wed, 18 Dec 2024 16:34:37 +0100
Subject: [PATCH] Do not write initial FIP for CpGrid with LGRs for now

---
 opm/simulators/flow/FlowProblemBlackoil.hpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/opm/simulators/flow/FlowProblemBlackoil.hpp b/opm/simulators/flow/FlowProblemBlackoil.hpp
index 5fe468b10..3540b1da0 100644
--- a/opm/simulators/flow/FlowProblemBlackoil.hpp
+++ b/opm/simulators/flow/FlowProblemBlackoil.hpp
@@ -562,8 +562,16 @@ public:
         // the initial solution.
         this->thresholdPressures_.finishInit();
 
-        if (this->simulator().episodeIndex() == 0) {
-            eclWriter_->writeInitialFIPReport();
+        // For CpGrid with LGRs, ecl-output is not supported yet.
+        const auto& grid = this->simulator().vanguard().gridView().grid();
+
+        using GridType = std::remove_cv_t<std::remove_reference_t<decltype(grid)>>;
+        constexpr bool isCpGrid = std::is_same_v<GridType, Dune::CpGrid>;
+        // Skip - for now -  calculate the initial fip values for CpGrid with LGRs.
+        if (!isCpGrid || (grid.maxLevel() == 0)) {
+            if (this->simulator().episodeIndex() == 0) {
+                eclWriter_->writeInitialFIPReport();
+            }
         }
     }