diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 26b93aa4..f90350a2 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -38,16 +38,16 @@ jobs:
       - name: Setup Conda
         uses: conda-incubator/setup-miniconda@v4
         with:
-          auto-activate: true
+          auto-activate: false
+          activate-environment: base
           channels: conda-forge
 
       - name: Configuring Conda Environment
-        shell: bash -l {0}
         run: |
           conda config --set always_yes yes --set changeps1 no
           conda config --add channels conda-forge
-          conda clean -a -y
-          conda env create -f environment.devenv.yml -n GEMS3K
+          conda install conda-devenv
+          conda run -n base python -m conda_devenv
 
       - name: Building, Testing & Installing GEMS3K
         if: matrix.os != 'windows-latest'
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 38abcf20..0b5051ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 cmake_minimum_required(VERSION 3.16..4.2)
 
 # Set the name of the project
-project(GEMS3K VERSION 4.5.3 LANGUAGES CXX C)
+project(GEMS3K VERSION 4.5.5 LANGUAGES CXX C)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
diff --git a/GEMS3K/ipm_main.cpp b/GEMS3K/ipm_main.cpp
index 325f2954..37ac9d97 100644
--- a/GEMS3K/ipm_main.cpp
+++ b/GEMS3K/ipm_main.cpp
@@ -875,11 +875,11 @@ long int TMultiBase::MassBalanceRefinement( long int WhereCalledFrom )
                       degenerate_cause = true;
                   }
 
-                  if( pm.B[II] < 1e-15 ) // need to remove hardcoded value
-                  {
-                    gems_logger->warn("MBR({}): B[{}]={:.3e}", WhereCalledFrom, II, pm.B[II]);
-                    iRet = 0; // treat as degenerate but not physically negligible, to avoid triggering AIA fallback
-                  }
+                  //if( pm.B[II] < 1e-15 ) // need to remove hardcoded value
+                  //{
+                  //  gems_logger->warn("MBR({}): B[{}]={:.3e}", WhereCalledFrom, II, pm.B[II]);
+                  //  iRet = 0; // treat as degenerate but not physically negligible, to avoid triggering AIA fallback
+                  //}
               }
           }