Improved two error messages

src/Parameters.cpp

@@ -78,7 +78,7 @@ ezc3d::ParametersNS::Parameters::Parameters(
         // Check if we spontaneously got to the next parameter.
         // Otherwise c3d is messed up
         if (!ignoreBadFormatting && file.tellg() != nextParamByteInFile){
-            throw std::ios_base::failure("Bad c3d formatting");
+            throw std::ios_base::failure("The format is not standard. If you want to ignore this error, set ignoreBadFormatting to true");
         }
 
         // Nb of char in the group name, locked if negative,

src/ezc3d.cpp

@@ -61,7 +61,7 @@ ezc3d::c3d::c3d(
     c_int_tp = std::vector<char>(m_nByteToReadMax_int + 1);
 
     if (!stream.is_open())
-        throw std::ios_base::failure("Could not open the c3d file");
+        throw std::ios_base::failure("The c3d file could not be opened, please verify the path");
 
     // Read all the section
     _header = std::shared_ptr<ezc3d::Header>(new ezc3d::Header(*this, stream));