From 4e51516a961ad0dfe4e0f7a5569d68e5421d3e92 Mon Sep 17 00:00:00 2001
From: Magne Sjaastad <magne.sjaastad@ceetronsolutions.com>
Date: Fri, 16 Dec 2022 07:00:45 +0100
Subject: [PATCH] Import of grid models: Support mix of lower and upper case
 letters in file name

* #9529 libecl: Allow mix of upper and lower case in file names
---
 ThirdParty/Ert/lib/ecl/ecl_util.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/ThirdParty/Ert/lib/ecl/ecl_util.cpp b/ThirdParty/Ert/lib/ecl/ecl_util.cpp
index f0ddca45dd..d8efe8c7b1 100644
--- a/ThirdParty/Ert/lib/ecl/ecl_util.cpp
+++ b/ThirdParty/Ert/lib/ecl/ecl_util.cpp
@@ -355,7 +355,11 @@ static bool valid_base(const char * input_base, bool * upper_case) {
 
   if (upper_case)
     *upper_case = upper;
-  return !(lower && upper);
+
+  // Disable checking of mixed upper and lower case
+  // https://github.com/OPM/ResInsight/issues/9529
+  return true;
+
 }