diff --git a/schedule/students_classes.csv b/schedule/students_classes.csv
index 61033aa..3693a3e 100644
--- a/schedule/students_classes.csv
+++ b/schedule/students_classes.csv
@@ -1,5 +1,5 @@
-StudentCode,StudentName,UcCode,ClassCode
-202025232,Iara,L.EIC002,1LEIC05
+StudentCode,StudentName,UcCode,ClassCode
+2020252£2,Iara,L.EIC002,1LEIC05
 202031607,Gisela,L.EIC004,1LEIC08
 202031607,Gisela,L.EIC005,1LEIC08
 202079037,Jose Jesualdo,L.EIC023,3LEIC08
diff --git a/src/CSVStudentsClasses.cpp b/src/CSVStudentsClasses.cpp
index 32f6b56..0a2b375 100644
--- a/src/CSVStudentsClasses.cpp
+++ b/src/CSVStudentsClasses.cpp
@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <fstream>
 #include <iostream>
+#include <ostream>
 #include <sstream>
 #include <string>
 #include <vector>
@@ -30,11 +31,12 @@ CSVStudentsClasses::CSVStudentsClasses(const std::string &csv) {
   std::string line;
   this->entries = std::vector<StudentsClasses>();
   if (!getline(s, line, '\n')) {
-    std::cerr << "ERROR: CRITICAL: INVALID FILE CSVSTUDENTCLASSES" << std::endl;
+    std::cerr << "ERROR: CRITICAL: INVALID FILE CSVSTUDENTCLASSES(0)" << std::endl;
     std::exit(1);
   }
   if (line != "StudentCode,StudentName,UcCode,ClassCode") {
-    std::cerr << "ERROR: CRITICAL: INVALID FILE CSVSTUDENTCLASSES" << std::endl;
+    std::cout << line <<" != " << std::string("StudentCode,StudentName,UcCode,ClassCode") << std::endl;
+    std::cerr << "ERROR: CRITICAL: INVALID FILE CSVSTUDENTCLASSES(1)" << std::endl;
     std::exit(1);
   }
   line.clear();