Index: org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/distanceTableBuffer/DistanceTableBufferAlgorithm.java
===================================================================
--- org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/distanceTableBuffer/DistanceTableBufferAlgorithm.java	(revisione 252)
+++ org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/distanceTableBuffer/DistanceTableBufferAlgorithm.java	(copia locale)
@@ -79,7 +79,7 @@
       sFieldNames[0] = "ID";
       sFieldNames[1] = "DIST";
       for (int i = 0; i < iFieldCount; i++) {
-         sFieldNames[i + 2] = layerIn.getFieldName(i);
+         sFieldNames[i + 2] = checkAttrName(layerIn.getFieldName(i), i + 2, sFieldNames);
          types[i + 2] = layerIn.getFieldType(i);
       }
 
Index: org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/fixedDistanceBuffer/FixedDistanceBufferAlgorithm.java
===================================================================
--- org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/fixedDistanceBuffer/FixedDistanceBufferAlgorithm.java	(revisione 252)
+++ org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/fixedDistanceBuffer/FixedDistanceBufferAlgorithm.java	(copia locale)
@@ -79,7 +79,7 @@
          sFieldNames[1] = "FROM";
          sFieldNames[1] = "TO";
          for (int i = 0; i < iFieldCount; i++) {
-            sFieldNames[i + 3] = layerIn.getFieldName(i);
+            sFieldNames[i + 3] = checkAttrName(layerIn.getFieldName(i), i + 3, sFieldNames);
             types[i + 3] = layerIn.getFieldType(i);
          }
       }
@@ -91,7 +91,7 @@
          sFieldNames[0] = "ID";
          sFieldNames[1] = "DIST";
          for (int i = 0; i < iFieldCount; i++) {
-            sFieldNames[i + 2] = layerIn.getFieldName(i);
+            sFieldNames[i + 2] = checkAttrName(layerIn.getFieldName(i), i + 2, sFieldNames);
             types[i + 2] = layerIn.getFieldType(i);
          }
       }
Index: org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/variableDistanceBuffer/VariableDistanceBufferAlgorithm.java
===================================================================
--- org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/variableDistanceBuffer/VariableDistanceBufferAlgorithm.java	(revisione 252)
+++ org.gvsig.toolbox.algorithm/src/main/java/es/unex/sextante/vectorTools/variableDistanceBuffer/VariableDistanceBufferAlgorithm.java	(copia locale)
@@ -79,7 +79,7 @@
          sFieldNames[1] = "FROM";
          sFieldNames[1] = "TO";
          for (int i = 0; i < iFieldCount; i++) {
-            sFieldNames[i + 3] = layerIn.getFieldName(i);
+            sFieldNames[i + 3] = checkAttrName(layerIn.getFieldName(i), i + 3, sFieldNames);
             types[i + 3] = layerIn.getFieldType(i);
          }
       }
@@ -91,7 +91,7 @@
          sFieldNames[0] = "ID";
          sFieldNames[1] = "DIST";
          for (int i = 0; i < iFieldCount; i++) {
-            sFieldNames[i + 2] = layerIn.getFieldName(i);
+            sFieldNames[i + 2] = checkAttrName(layerIn.getFieldName(i), i + 2, sFieldNames);
             types[i + 2] = layerIn.getFieldType(i);
          }
       }