diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4ChangeColumnType.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4ChangeColumnType.java
index a31a8ed..aeaf4a5 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4ChangeColumnType.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/opexecution/OpExecution4ChangeColumnType.java
@@ -70,6 +70,8 @@ public class OpExecution4ChangeColumnType extends OpExecutionBuilder {
 
 			map.put(Constants.PARAMETER_TARGET_DATA_TYPE, ColumnDataTypeMap
 					.map(changeColumnTypeSession.getColumnDataTypeTarget()));
+			map.put(Constants.PARAMETER_PERIOD_INPUT_FORMAT_ID, changeColumnTypeSession
+					.getValueDataFormat().getId());
 			invocation = new OperationExecution(changeColumnTypeSession
 					.getColumnData().getColumnId(),
 					operationDefinition.getOperationId(), map);
@@ -152,6 +154,9 @@ public class OpExecution4ChangeColumnType extends OpExecutionBuilder {
 
 			map.put(Constants.PARAMETER_TARGET_DATA_TYPE, ColumnDataTypeMap
 					.map(changeColumnTypeSession.getColumnDataTypeTarget()));
+			map.put(Constants.PARAMETER_PERIOD_INPUT_FORMAT_ID, changeColumnTypeSession
+					.getValueDataFormat().getId());
+			
 			invocation = new OperationExecution(changeColumnTypeSession
 					.getColumnData().getColumnId(),
 					operationDefinition.getOperationId(), map);
@@ -163,7 +168,7 @@ public class OpExecution4ChangeColumnType extends OpExecutionBuilder {
 			map.put(Constants.PARAMETER_PERIOD_FORMAT, changeColumnTypeSession
 					.getPeriodDataType().getLabel());
 			map.put(Constants.PARAMETER_PERIOD_INPUT_FORMAT_ID, changeColumnTypeSession
-					.getTimeDataFormat().getId());
+					.getValueDataFormat().getId());
 			
 			invocation = new OperationExecution(changeColumnTypeSession
 					.getColumnData().getColumnId(),
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/type/ChangeColumnTypeSession.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/type/ChangeColumnTypeSession.java
index 3365852..b392116 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/type/ChangeColumnTypeSession.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/type/ChangeColumnTypeSession.java
@@ -22,7 +22,7 @@ public class ChangeColumnTypeSession implements Serializable {
 	private String locale;
 
 	private PeriodDataType timeDimensionType;
-	private ValueDataFormat timeDataFormat;
+	private ValueDataFormat valueDataFormat;
 	private ColumnData codelistColumnReference;
 
 	private ColumnMappingList columnMappingList;
@@ -122,12 +122,12 @@ public class ChangeColumnTypeSession implements Serializable {
 		this.timeDimensionType = timeDimensionType;
 	}
 	
-	public ValueDataFormat getTimeDataFormat() {
-		return timeDataFormat;
+	public ValueDataFormat getValueDataFormat() {
+		return valueDataFormat;
 	}
 
-	public void setTimeDataFormat(ValueDataFormat timeDataFormat) {
-		this.timeDataFormat = timeDataFormat;
+	public void setValueDataFormat(ValueDataFormat valueDataFormat) {
+		this.valueDataFormat = valueDataFormat;
 	}
 
 	public String getLocale() {
@@ -154,7 +154,7 @@ public class ChangeColumnTypeSession implements Serializable {
 				+ columnTypeCodeTarget + ", columnDataTypeTarget="
 				+ columnDataTypeTarget + ", locale=" + locale
 				+ ", timeDimensionType=" + timeDimensionType
-				+ ", timeDataFormat=" + timeDataFormat
+				+ ", timeDataFormat=" + valueDataFormat
 				+ ", codelistColumnReference=" + codelistColumnReference
 				+ ", columnMappingList=" + columnMappingList + "]";
 	}