Closes #33

core/dbc_parser.cpp

@@ -83,6 +83,8 @@ namespace {
             return DbcDiagnosticCode::InvalidMultiplexing;
         if (keyword == "VAL_")
             return DbcDiagnosticCode::InvalidValueDescription;
+        if (keyword == "SIG_VALTYPE_")
+            return DbcDiagnosticCode::UnsupportedSignalType;
         return DbcDiagnosticCode::InvalidStatement;
     }
 }