Index: ssts-recyclingapplication/src/main/java/com/forgon/disinfectsystem/recyclingapplication/action/RecyclingApplicationAction.java
===================================================================
diff -u -r14021 -r14043
--- ssts-recyclingapplication/src/main/java/com/forgon/disinfectsystem/recyclingapplication/action/RecyclingApplicationAction.java	(.../RecyclingApplicationAction.java)	(revision 14021)
+++ ssts-recyclingapplication/src/main/java/com/forgon/disinfectsystem/recyclingapplication/action/RecyclingApplicationAction.java	(.../RecyclingApplicationAction.java)	(revision 14043)
@@ -78,6 +78,7 @@
 import com.forgon.tools.MathTools;
 import com.forgon.tools.StrutsParamUtils;
 import com.forgon.tools.StrutsResponseUtils;
+import com.forgon.tools.db.DatabaseUtil;
 import com.forgon.tools.hibernate.ObjectDao;
 import com.forgon.tools.json.JsonPropertyFilter;
 import com.google.common.reflect.TypeToken;
@@ -1453,12 +1454,13 @@
 						page);
 
 			} else if (ImageFile.IMAGE_TYPE_MATERIAL.equals(imageType)) {
-				MaterialDefinition material = materialDefinitionManager
-						.getMaterialDefinitionById(materialId);
+				if(DatabaseUtil.isPoIdValid(materialId)){
+					MaterialDefinition material = materialDefinitionManager
+							.getMaterialDefinitionById(materialId);
 
-				img = imageFileManager.getImageByIdAndType(material.getId(),
-						ImageFile.IMAGE_TYPE_MATERIAL, page);
-
+					img = imageFileManager.getImageByIdAndType(material.getId(),
+							ImageFile.IMAGE_TYPE_MATERIAL, page);
+				}
 			}
 
 			OutputStream outputStream = null;