diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 93ed022..3d91314 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -24,6 +24,15 @@ jobs:
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         custom_tag: ${{ steps.variables.outputs.TAG_NAME }}
+    
+    - name: Update major version tag
+      run: |
+        VERSION=${{ steps.variables.outputs.TAG_NAME }}
+        MAJOR=${VERSION%%.*}
+        git config --global user.name 'GitHub Actions'
+        git config --global user.email 'action@github.com'
+        git tag -fa "${MAJOR}" -m 'Update major version tag with $VERSION'
+        git push origin "${MAJOR}" --force
         
     - name: Create a GitHub release
       uses: ncipollo/release-action@main
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3817e0d..1b0b766 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,8 +55,6 @@ find_package(Threads REQUIRED)
 
 find_package(FFTW REQUIRED)
 
-find_library(LIBSTDCXX_LIBRARY stdc++)
-
 # Register all source and header files
 file(GLOB_RECURSE 
 	SOURCES 
@@ -100,16 +98,6 @@ target_link_libraries(
 		${HDF5_LIBRARIES}
 )
 
-if(LIBSTDCXX_LIBRARY)
-	message("Linking to libstdc++ at ${LIBSTDCXX_LIBRARY}")
-	target_link_libraries(
-        	${PROJECT_NAME}
-        	PUBLIC
-			${LIBSTDCXX_LIBRARY}
-	)
-
-endif()
-
 # Install library's binary files and headers
 install(
 	TARGETS ${PROJECT_NAME}
diff --git a/README.md b/README.md
index 7b470c2..3797156 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # xmippCore
 
-[![CI](https://github.com/I2PC/xmippCore/actions/workflows/main.yml/badge.svg)](https://github.com/I2PC/xmippCore/actions/workflows/main.yml)
+[![CI](https://github.com/I2PC/xmippCore/actions/workflows/build.yml/badge.svg)](https://github.com/I2PC/xmippCore/actions/workflows/build.yml)
 
 
 **>>> To install Xmipp, please visit [this](https://github.com/I2PC/xmipp#xmipp) <<<**
diff --git a/core/metadata_vec.cpp b/core/metadata_vec.cpp
index 111d310..86338b7 100644
--- a/core/metadata_vec.cpp
+++ b/core/metadata_vec.cpp
@@ -820,7 +820,10 @@ void MetaDataVec::split(size_t parts, std::vector<MetaDataVec> &results, const M
         REPORT_ERROR(ERR_MD, "MetaDataDb::split: Couldn't split a metadata in more parts than its size");
 
     MetaDataVec sorted;
-    sorted.sort(*this, sortLabel);
+    if (sortLabel == MDL_UNDEFINED)
+        sorted = *this;
+    else
+        sorted.sort(*this, sortLabel);
 
     results.clear();
     results.resize(parts);