diff --git a/paramecio/cromosoma/corefields.py b/paramecio/cromosoma/corefields.py
index 7e6c2ab..2feae0c 100644
--- a/paramecio/cromosoma/corefields.py
+++ b/paramecio/cromosoma/corefields.py
@@ -22,6 +22,7 @@ class IntegerField(PhangoField):
         except:
             
             value="0"
+            self.txt_error="The value is zero"
             self.error=True
         
         return value
@@ -50,6 +51,7 @@ class FloatField(PhangoField):
         except:
             
             value="0"
+            self.txt_error="The value is zero"
             self.error=True
         
         return value
@@ -133,6 +135,7 @@ class BooleanField(IntegerField):
         except:
             
             self.error=True
+            self.txt_error="Need 0 or 1 value"
             value=0
 
         value=str(value)
@@ -152,4 +155,4 @@ class BooleanField(IntegerField):
         else:
             value=self.no_text
     
-        return value
+        return str(value)
diff --git a/paramecio/cromosoma/extrafields/ipfield.py b/paramecio/cromosoma/extrafields/ipfield.py
index 486fe5c..4e87357 100644
--- a/paramecio/cromosoma/extrafields/ipfield.py
+++ b/paramecio/cromosoma/extrafields/ipfield.py
@@ -12,7 +12,8 @@ class IpField(CharField):
         except:
             
             self.error=True
+            self.txt_error='No Valid IP'
             value=""
 
             
-        return value
\ No newline at end of file
+        return value