=== modified file 'dhis-2/dhis-web/dhis-web-dataentry/src/main/java/org/hisp/dhis/de/action/GetHistoryChartAction.java'
--- dhis-2/dhis-web/dhis-web-dataentry/src/main/java/org/hisp/dhis/de/action/GetHistoryChartAction.java	2012-02-16 19:58:55 +0000
+++ dhis-2/dhis-web/dhis-web-dataentry/src/main/java/org/hisp/dhis/de/action/GetHistoryChartAction.java	2013-02-05 15:46:36 +0000
@@ -91,16 +91,16 @@
     // Input
     // -------------------------------------------------------------------------
 
-    private Integer dataElementId;
+    private String dataElementId;
 
-    public void setDataElementId( Integer dataElementId )
+    public void setDataElementId( String dataElementId )
     {
         this.dataElementId = dataElementId;
     }
 
-    private Integer categoryOptionComboId;
+    private String categoryOptionComboId;
 
-    public void setCategoryOptionComboId( Integer categoryOptionComboId )
+    public void setCategoryOptionComboId( String categoryOptionComboId )
     {
         this.categoryOptionComboId = categoryOptionComboId;
     }

=== modified file 'dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/history.vm'
--- dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/history.vm	2013-02-05 15:43:30 +0000
+++ dhis-2/dhis-web/dhis-web-dataentry/src/main/webapp/dhis-web-dataentry/history.vm	2013-02-05 15:46:36 +0000
@@ -78,7 +78,7 @@
 			<div class="historyHeader">$encoder.htmlEncode( $i18n.getString( "history_not_valid" ) )</div>	
 			#else
 			<div class="historyHeader">$encoder.htmlEncode( $i18n.getString( "dataelement_history" ) )</div>
-			<img id="historyChart" src="getHistoryChart.action?dataElementId=${dataElementHistory.dataElement.id}&categoryOptionComboId=${dataElementHistory.optionCombo.id}&organisationUnitId=${dataElementHistory.organisationUnit.id}&periodId=${periodId}"/>
+			<img id="historyChart" src="getHistoryChart.action?dataElementId=${dataElementHistory.dataElement.uid}&categoryOptionComboId=${dataElementHistory.optionCombo.uid}&organisationUnitId=${dataElementHistory.organisationUnit.id}&periodId=${periodId}"/>
 			#end
         </td>
     </tr>