diff --git a/flake.nix b/flake.nix
index 1f19f07..517f42f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,10 +26,15 @@
             spdlog
             fmt
             postgresql
+            gmp
           ];
 
           shellHook = ''
-            PATH="${pkgs.gnucobol}/bin:$PATH"
+            export PATH="${pkgs.gnucobol.bin}/bin:$PATH"
+            export LD_LIBRARY_PATH="${pkgs.gnucobol.lib}/lib:$LD_LIBRARY_PATH"
+            export GNUCOBOL_BIN="${pkgs.gnucobol.bin}/bin"
+            export GNUCOBOL_LIB="${pkgs.gnucobol.lib}/lib"
+            export GNUCOBOL_SHARE="${pkgs.gnucobol.bin}/share"
           '';
         };
       };
diff --git a/gixsql-tests-nunit/CompilerConfig.cs b/gixsql-tests-nunit/CompilerConfig.cs
index f1f0bc7..4b40724 100644
--- a/gixsql-tests-nunit/CompilerConfig.cs
+++ b/gixsql-tests-nunit/CompilerConfig.cs
@@ -1,4 +1,4 @@
-//using Microsoft.VisualStudio.TestTools.UnitTesting;
+//using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
 using System.IO;
 using System.Xml;
@@ -18,7 +18,6 @@ internal class CompilerConfig
         public string cobc_homedir { get; private set; }
         public string cobc_bin_dir_path { get; private set; }
         public string cobc_lib_dir_path { get; private set; }
-        public string cobc_config_dir_path { get; private set; }
 
         public string link_lib_dir_path { get; private set; }
         public string link_lib_name { get; private set; }
@@ -68,10 +67,6 @@ public static CompilerConfig init(CompilerType ctype, string configuration, stri
             cc.cobc_lib_dir_path = cc.cobc_lib_dir_path.Replace("${homedir}", cc.cobc_homedir).Replace("${gixdata}", cc.gix_data_dir);
             Assert.IsTrue(Directory.Exists(cc.cobc_lib_dir_path));
 
-            cc.cobc_config_dir_path = xp.SelectSingleNode("config_dir_path")?.InnerText;
-            cc.cobc_config_dir_path = cc.cobc_config_dir_path.Replace("${homedir}", cc.cobc_homedir).Replace("${gixdata}", cc.gix_data_dir);
-            Assert.IsTrue(Directory.Exists(cc.cobc_config_dir_path));
-
             cc.gix_copy_path = Path.Combine(gix_base_path, "lib", "copy");
             Assert.IsTrue(Directory.Exists(cc.gix_copy_path));
             Assert.IsTrue(File.Exists(Path.Combine(cc.gix_copy_path, "SQLCA.cpy")));
diff --git a/gixsql-tests-nunit/CompilerConfig2.cs b/gixsql-tests-nunit/CompilerConfig2.cs
index 3596ad6..7dc3a1a 100644
--- a/gixsql-tests-nunit/CompilerConfig2.cs
+++ b/gixsql-tests-nunit/CompilerConfig2.cs
@@ -1,4 +1,4 @@
-//using Microsoft.VisualStudio.TestTools.UnitTesting;
+//using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
 using System.IO;
 using System.Xml;
@@ -12,7 +12,6 @@ public class CompilerConfig2
 
         public string cobc_bin_dir_path { get; private set; }
         public string cobc_lib_dir_path { get; private set; }
-        public string cobc_config_dir_path { get; private set; }
 
         public string gixsql_bin_path { get; private set; }
         public string gixsql_lib_path { get; private set; }
@@ -50,9 +49,6 @@ public static CompilerConfig2 init(XmlElement xc)
                 cc.cobc_lib_dir_path = Environment.ExpandEnvironmentVariables(xc.SelectSingleNode("lib_dir_path")?.InnerText);
                 if (!Directory.Exists(cc.cobc_lib_dir_path)) throw new Exception(cc.cobc_lib_dir_path);
 
-                cc.cobc_config_dir_path = Environment.ExpandEnvironmentVariables(xc.SelectSingleNode("config_dir_path")?.InnerText);
-                if (!Directory.Exists(cc.cobc_config_dir_path)) throw new Exception(cc.cobc_config_dir_path);
-
                 if (isWindows)
                     cc.gixsql_copy_path = Path.Combine(gix_base_path, "lib", "copy");
                 else
@@ -61,8 +57,8 @@ public static CompilerConfig2 init(XmlElement xc)
                 if (!Directory.Exists(cc.gixsql_copy_path)) throw new Exception(cc.gixsql_copy_path);
                 if (!File.Exists(Path.Combine(cc.gixsql_copy_path, "SQLCA.cpy"))) throw new Exception();
 
-                cc.gixsql_bin_path = Path.Combine(gix_base_path, "bin"); 
-                
+                cc.gixsql_bin_path = Path.Combine(gix_base_path, "bin");
+
                 cc.gixsql_lib_path = Path.Combine(gix_base_path, "lib");
                 if (isWindows)
                     cc.gixsql_link_lib_dir_path = Path.Combine(cc.gixsql_lib_path, compiler_arch, compiler_type);
diff --git a/gixsql-tests-nunit/GixSqlDynamicTestRunner.cs b/gixsql-tests-nunit/GixSqlDynamicTestRunner.cs
index 61e456e..3a27e27 100644
--- a/gixsql-tests-nunit/GixSqlDynamicTestRunner.cs
+++ b/gixsql-tests-nunit/GixSqlDynamicTestRunner.cs
@@ -370,7 +370,6 @@ private void compile(GixSqlTestData td)
                            .WithArguments(cobc_args)
                            .WithEnvironmentVariables(new Dictionary<string, string>
                            {
-                               ["COB_CONFIG_DIR"] = cc.cobc_config_dir_path,
                                ["PATH"] = Environment.GetEnvironmentVariable("PATH") + $"{Path.PathSeparator}{cc.cobc_bin_dir_path}"
                            })
                            .WithValidation(CommandResultValidation.None)
diff --git a/gixsql-tests-nunit/Runner.cs b/gixsql-tests-nunit/Runner.cs
index 512583f..4920eae 100644
--- a/gixsql-tests-nunit/Runner.cs
+++ b/gixsql-tests-nunit/Runner.cs
@@ -1,4 +1,4 @@
-using gixsql_tests;
+using gixsql_tests;
 using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 using System;
 using System.Collections.Generic;
@@ -42,7 +42,7 @@ public static int Main(string[] args)
                 }
             }
 
-            int num_results_ok = results.Count(a => a.Value == "KO");
+            int num_results_ok = results.Count(a => a.Value == "OK");
             int num_results_ko = results.Count(a => a.Value == "KO");
 
             int mlen = results.Select(a => a.Key.Length).Max();
diff --git a/gixsql-tests-nunit/data/gixsql_test_data.xml b/gixsql-tests-nunit/data/gixsql_test_data.xml
index 7680b50..7f3c5b2 100644
--- a/gixsql-tests-nunit/data/gixsql_test_data.xml
+++ b/gixsql-tests-nunit/data/gixsql_test_data.xml
@@ -1,8 +1,8 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8" ?>
 <test-data>
 
 	<tests>
-		
+
 		<test name="TSQL001A" enabled="true">
 			<description>Open connection, cursor</description>
 			<issue-coverage>#000</issue-coverage>
@@ -234,7 +234,7 @@
 			<compile value="true" />
 			<run value="true" />
 
-			<additional-preprocess-params value="-N 2" />
+<!-- 			<additional-preprocess-params value="-N 2" /> -->
 
 			<expected-output>
 				<line>employee #: [+0123]</line>
@@ -2293,7 +2293,7 @@
 			<pre-run-sql-statement data-source-index="1">CREATE TABLE TAB02 (CID INTEGER, FLD CHAR(100))</pre-run-sql-statement>
 			<pre-run-sql-statement data-source-index="1">CREATE TABLE TAB03 (CID INTEGER, FLD CHAR(100))</pre-run-sql-statement>
 			<pre-run-sql-statement data-source-index="1">CREATE TABLE TAB04 (CID INTEGER, FLD CHAR(100))</pre-run-sql-statement>
-			
+
 			<preprocess value="true" />
 			<compile value="true" />
 			<run value="true" />
@@ -2785,7 +2785,7 @@
 			<expected-preprocessed-file-content>
 			</expected-preprocessed-file-content>
 		</test>
-		
+
 		<test name="TSQL037B" enabled="true" applies-to="pgsql">
 			<description>Implementation of updatable cursors (with parameters)</description>
 			<issue-coverage>#000</issue-coverage>
@@ -3223,7 +3223,7 @@
 			<expected-preprocessed-file-content>
 			</expected-preprocessed-file-content>
 		</test>
-	
+
 		<test name="TSQL038A" enabled="false">
 			<description>Implementation of updatable cursors (with parameters)</description>
 			<issue-coverage>#000</issue-coverage>
diff --git a/libgixpp/ESQLDefinitions.h b/libgixpp/ESQLDefinitions.h
index eb3cbf4..8b9ba12 100644
--- a/libgixpp/ESQLDefinitions.h
+++ b/libgixpp/ESQLDefinitions.h
@@ -113,7 +113,7 @@ struct esql_connection_info_t
 	hostref_or_literal_t *data_source = nullptr;
 	hostref_or_literal_t *username = nullptr;
 	hostref_or_literal_t *password = nullptr;
-	
+
 	// for compatibility
 	hostref_or_literal_t *dbname = nullptr;
 };
@@ -239,7 +239,7 @@ struct connect_to_info_t
 };
 
 // This will disappear when the standalone debugger will be the only option
-// For now this quick hack prevents compilation errors and having to 
+// For now this quick hack prevents compilation errors and having to
 // refactor this into an external file
 #ifndef _GIXPP_BLOCK_
 #define _GIXPP_BLOCK_
@@ -262,7 +262,7 @@ struct PreprocessedBlockInfo {
 	int pp_end_line = 0;
 	int pp_gen_start_line = 0;
 	int pp_gen_end_line = 0;
-	
+
 	PreprocessedBlockType type;
 
 	std::string command;
diff --git a/run_test.sh b/run_test.sh
new file mode 100755
index 0000000..2d86ecb
--- /dev/null
+++ b/run_test.sh
@@ -0,0 +1,133 @@
+#!/bin/env bash
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# Default configuration
+BUILD_DIR=${BUILD_DIR:=./_build}
+INSTALL_DIR=${INSTALL_DIR:=install}
+
+POSTGRE_HOST=${POSTGRE_HOST:=localhost}
+POSTGRE_PORT=${POSTGRE_PORT:=5432}
+POSTGRE_USER=${POSTGRE_USER:=test}
+POSTGRE_PWD=${POSTGRE_PWD:=test}
+POSTGRE_DB1=${POSTGRE_DB1:=testdb1}
+POSTGRE_DB2=${POSTGRE_DB2:=testdb2}
+
+TEST_VERBOSITY=${TEST_VERBOSITY:=0}
+TEST_DIR=${TEST_DIR:=/tmp/gixsql-test}
+export GIXTEST_LOCAL_CONFIG="$TEST_DIR/config.xml"
+
+INSTALL_PATH="$PWD/$BUILD_DIR/$INSTALL_DIR"
+
+# Build and locally install the project
+if [ ! -f "./extra_files.mk" ]; then
+  touch "extra_files.mk"
+fi
+
+if [ ! -d "$BUILD_DIR" ]; then
+  mkdir "$BUILD_DIR"
+  echo "Create directory $BUILD_DIR"
+fi
+
+echo "Compiling gixsql..."
+cd $BUILD_DIR
+
+if [ ! -d "$INSTALL_DIR" ]; then
+  mkdir "$INSTALL_DIR"
+  echo "Install gixsql in $INSTALL_PATH"
+fi
+
+../configure --prefix="$INSTALL_PATH" > /dev/null
+make -j 8 > /dev/null
+make install > /dev/null
+cd ..
+
+echo "Preparing tests..."
+if [ -d "$TEST_DIR" ]; then
+  while true; do
+      read -p "We need to erase the directory $TEST_DIR. Remove it? " yn
+      case $yn in
+          [Yy]* ) rm -Rf $TEST_DIR; break;;
+          [Nn]* ) exit;;
+          * ) echo "Please answer yes or no.";;
+      esac
+  done
+fi
+
+mkdir "$TEST_DIR"
+
+# Output the configuration file for the runner
+cat <<EOF >> $TEST_DIR/config.xml
+<?xml version="1.0" encoding="utf-8" ?>
+<test-local-config>
+
+	<global>
+    <gixsql-install-base>$INSTALL_PATH</gixsql-install-base>
+		<keep-temps>1</keep-temps>
+		<verbose>$TEST_VERBOSITY</verbose>
+		<test-filter></test-filter>
+		<dbtype-filter>pgsql</dbtype-filter>
+    <mem-check></mem-check>
+		<temp-dir>$TEST_DIR</temp-dir>
+		<environment>
+			<variable key="GIXSQL_FIXUP_PARAMS" value="on" />
+		</environment>
+	</global>
+
+	<architectures>
+		<architecture id="x64" />
+	</architectures>
+	<compiler-types>
+		<compiler-type id="gcc" />
+	</compiler-types>
+
+	<compilers>
+		<compiler type="gcc" architecture="x64" id="gnucobol-3.1.2-linux-gcc-x64">
+      <bin_dir_path>$GNUCOBOL_BIN</bin_dir_path>
+      <lib_dir_path>$GNUCOBOL_LIB</lib_dir_path>
+			<config_dir_path>$GNUCOBOL_SHARE/gnucobol/config</config_dir_path>
+			<environment>
+			</environment>
+		</compiler>
+	</compilers>
+
+	<data-source-clients>
+		<data-source-client type="pgsql" architecture="x64">
+			<environment>
+			</environment>
+			<provider value="Npgsql" />
+		</data-source-client>
+	</data-source-clients>
+
+	<data-sources>
+		<data-source type="pgsql" index="1">
+      <hostname>localhost</hostname>
+      <type>pgsql</type>
+			<port>$POSTGRE_PORT</port>
+			<dbname>$POSTGRE_DB1</dbname>
+			<username>$POSTGRE_USER</username>
+			<password>$POSTGRE_PWD</password>
+			<options>native_cursors=off</options>
+		</data-source>
+		<data-source type="pgsql" index="2">
+      <hostname>localhost</hostname>
+      <type>pgsql</type>
+			<port>$POSTGRE_PORT</port>
+			<dbname>$POSTGRE_DB2</dbname>
+			<username>$POSTGRE_USER</username>
+			<password>$POSTGRE_PWD</password>
+			<options>native_cursors=off</options>
+		</data-source>
+	</data-sources>
+</test-local-config>
+EOF
+
+echo "Building runner..."
+# We have to rebuild the test runner because it includes test files...
+dotnet build "gixsql-tests-nunit/gixsql-tests-nunit.csproj" > /dev/null
+
+# Start the runner
+dotnet "gixsql-tests-nunit/bin/Debug/net6.0/gixsql-tests-nunit.dll"
+
+echo "Results of the tests can found in $TEST_DIR"