diff --git a/CGIFormattedData.cpp b/CGIFormattedData.cpp
index 0257334..98c4342 100644
--- a/CGIFormattedData.cpp
+++ b/CGIFormattedData.cpp
@@ -6,22 +6,25 @@ namespace coreutils {
    CGIFormattedData::CGIFormattedData() {}
    
    CGIFormattedData::CGIFormattedData(ZString cgiData) {
-      cgiData.split("&");
-      for(int ix = 0; ix < cgiData.getList().size(); ++ix) {
-	 cgiData[ix].split("=");
-	 data[cgiData[ix][0]] = cgiData[ix][1];
-	 data[cgiData[ix][0]].fromCGI();
+      if(cgiData != "") {	   
+	 cgiData.split("&");
+	 for(int ix = 0; ix < cgiData.getList().size(); ++ix) {
+	    cgiData[ix].split("=");
+	    data[cgiData[ix][0]] = cgiData[ix][1];
+	    data[cgiData[ix][0]].fromCGI();
+	 }
       }      
    }
 
    ZString CGIFormattedData::operator=(ZString cgiData) {
-      cgiData.split("&");
-      for(int ix = 0; ix < cgiData.getList().size(); ++ix) {
-	 cgiData[ix].split("=");
-	 data[cgiData[ix][0]] = cgiData[ix][1];
-	 data[cgiData[ix][0]].fromCGI();
-      }      
+      if(cgiData != "") {	   
+	 cgiData.split("&");
+	 for(int ix = 0; ix < cgiData.getList().size(); ++ix) {
+	    cgiData[ix].split("=");
+	    data[cgiData[ix][0]] = cgiData[ix][1];
+	    data[cgiData[ix][0]].fromCGI();
+	 }
+      }
       return cgiData;
-   }
-      
+   }      
 }
diff --git a/MFile.cpp b/MFile.cpp
index f35044d..314af2e 100644
--- a/MFile.cpp
+++ b/MFile.cpp
@@ -3,18 +3,22 @@
 #include <sys/stat.h>
 
 namespace coreutils {
-
+   
    MFile::MFile(coreutils::MString fileName) : fileName(fileName) {
       inFile.open(fileName.c_str());
-//      *this << inFile;
+      *this << inFile;
+//      inFile >> *this;
       inFile.close();      
    }
 
+   MFile::~MFile() {
+      update();
+   }
+      
    void MFile::update() {
       outFile.open(fileName.c_str());
       outFile << *this;
       outFile.close();
-   }
-   
+   }   
 
 }
diff --git a/MFile.h b/MFile.h
index fd8e928..25e9384 100644
--- a/MFile.h
+++ b/MFile.h
@@ -25,7 +25,7 @@ namespace coreutils {
       std::ifstream inFile;
       std::ofstream outFile;
 
-      void onChange() override;
+//      void onChange() override;
       void update();
       
    };
diff --git a/MString.cpp b/MString.cpp
index 1c86002..f24c571 100644
--- a/MString.cpp
+++ b/MString.cpp
@@ -11,6 +11,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <cctype>
+#include <fstream>
 
 namespace coreutils {
    
@@ -216,6 +217,13 @@ namespace coreutils {
       return *this;
    }
 
+   MString &MString::operator<<(std::ifstream &pf) {
+      std::string line;
+      while(std::getline(pf, line)) 
+	*this << line << '\n';      
+      return *this;
+   }
+   
 //   MString &operator<<(std::ostream &out) {
 //      *this << out;
 //   }
diff --git a/MString.h b/MString.h
index 4fa32e9..c2b1ed9 100644
--- a/MString.h
+++ b/MString.h
@@ -170,6 +170,12 @@ namespace coreutils {
       /// 
       ///
 
+      MString &operator<<(std::ifstream &pf);
+
+      ///
+      /// 
+      ///
+
       MString &operator<<(std::ostream &out);
       
       ///
diff --git a/ZString.cpp b/ZString.cpp
index cb0fc9e..bc362f2 100644
--- a/ZString.cpp
+++ b/ZString.cpp
@@ -117,11 +117,18 @@ namespace coreutils {
    }
 
    bool ZString::operator!=(const char *valuex) const {
-      if(strlen(valuex) != length)
-        return true;
-      return (strncmp(data, valuex, length) != 0);
+      if(valuex == NULL) {
+	 if(length == 0)
+	   return false;
+	 else
+	   return true;
+      } else {	   
+	 if(strlen(valuex) != length)
+	   return true;
+	 return (strncmp(data, valuex, length) != 0);
+      }
    }
-
+   
    std::vector<ZString> &ZString::getList() {
       return list;
    }
diff --git a/testing/compile b/testing/compile
index 46de7d7..b305a03 100755
--- a/testing/compile
+++ b/testing/compile
@@ -2,3 +2,4 @@
 g++ -g -std=c++20 -o zstring_test zstring_test.cpp -I.. -L.. -lCoreUtils
 g++ -g -std=c++20 -o mstring_test mstring_test.cpp -I.. -L.. -lCoreUtils -lb64
 g++ -o jstring_test jstring_test.cpp -I.. -L.. -lCoreUtils
+g++ -g -std=c++20 -o mfile_test mfile_test.cpp -I.. -L.. -lCoreUtils
diff --git a/testing/json_sample b/testing/json_sample
new file mode 100644
index 0000000..e69de29
diff --git a/testing/jstring_test b/testing/jstring_test
index fab3eb8..74d88c6 100755
Binary files a/testing/jstring_test and b/testing/jstring_test differ
diff --git a/testing/mfile_test b/testing/mfile_test
new file mode 100755
index 0000000..e91b3a4
Binary files /dev/null and b/testing/mfile_test differ
diff --git a/testing/mfile_test.cpp b/testing/mfile_test.cpp
new file mode 100644
index 0000000..f3a9064
--- /dev/null
+++ b/testing/mfile_test.cpp
@@ -0,0 +1,7 @@
+#include <iostream>
+#include "../MFile.h"
+int main(int argc, char **argv) {
+   coreutils::MFile data("testdata.data");
+   std::cout << data << std::endl;
+   return 0;
+}
\ No newline at end of file
diff --git a/testing/testdata.data b/testing/testdata.data
new file mode 100644
index 0000000..c4e2675
--- /dev/null
+++ b/testing/testdata.data
@@ -0,0 +1,7 @@
+#include <iostream>
+#include "../MFile.h"
+int main(int argc, char **argv) {
+   coreutils::MFile data("testdata.data");
+   std::cout << data << std::endl;
+   return 0;
+}