Index: ssts-webservice/src/main/java/com/forgon/disinfectsystem/webservice/service/ServiceManagerImpl.java
===================================================================
diff -u -r13393 -r13405
--- ssts-webservice/src/main/java/com/forgon/disinfectsystem/webservice/service/ServiceManagerImpl.java	(.../ServiceManagerImpl.java)	(revision 13393)
+++ ssts-webservice/src/main/java/com/forgon/disinfectsystem/webservice/service/ServiceManagerImpl.java	(.../ServiceManagerImpl.java)	(revision 13405)
@@ -1833,7 +1833,7 @@
 		JSONObject result = new JSONObject();
 		result.put("barcode", sterilisation.getBarcode());
 		result.put("name", sterilisation.getSterilisation());
-		result.put("sterilizationPurpose", sterilisation.getSterilizationPurpose());
+		result.put("sterilizationPurpose", StringTools.defaultIfEmpty(sterilisation.getSterilizationPurpose(), ""));
 		return result;
 	}