try{

				host = APILocator.getHostAPI().findDefaultHost(systemUser, true);

				systemUser = APILocator.getUserAPI().getSystemUser();

				Logger.info(this, "Searching for Contentlets");
				String originalPatter = searchString;
				String newPatter = replaceString;
				Pattern patter = Pattern.compile(originalPatter);
				Matcher matcher = patter.matcher("");
				int cicleValue = 1000;
				int offSet = 0;
				int contentletsCounter = 0;
				int contentletsProccesed = 0;

				List<Contentlet> contentlets = conAPI.search("+working:true -structureName:Host", cicleValue, offSet, "", APILocator.getUserAPI().getSystemUser(), false);
				int size = contentlets.size();
				Logger.info(this, "Processing first set of " + size);
				while(size > 0)
				{
					for(int i = 0;i < size;i++)
					{
						Contentlet contentlet = contentlets.get(i);

						try {
							boolean changed = false;
							Logger.debug(this, "Modifying Contentlet with inode " + contentlet.getInode());
							List<Field> fields = FieldsCache.getFieldsByStructureInode(contentlet.getStructureInode());
							for (Field field : fields) {
								FieldAPI fapi = APILocator.getFieldAPI();
								boolean stringProperty = fapi.isString(field);
								if(stringProperty){
									String value = "";
									Object fValue = conAPI.getFieldValue(contentlet, field);
									if(fValue == null){
										fValue = "";
									}else{
										if(fValue instanceof String)
											value = (String)fValue;
									}
									if(UtilMethods.isSet(value)){
										matcher.reset(value);
										if(matcher.find()){
											changed = true;
											conAPI.setContentletProperty(contentlet, field, matcher.replaceAll(newPatter));
										}
									}
									else {
										changed = false;
									}
								}
							}

							if(changed)
							{
								//contentlet.setInode(null);
								contentlet.setInode("");
								contentlet = conAPI.checkin(contentlet,APILocator.getUserAPI().getSystemUser(), true);
								APILocator.getVersionableAPI().setWorking(contentlet);
								contentletsCounter++;
							}
							contentletsProccesed++;
						} catch (Exception e) {
							Logger.error(this, "Unable to checkin content id = " + contentlet.getIdentifier() +
									", skipping it and going to next one.", e);
						}
					}
					offSet += cicleValue;
					contentlets = conAPI.search("+working:true -structureName:Host", cicleValue, offSet, "", APILocator.getUserAPI().getSystemUser(), false);
					size = contentlets.size();
					Logger.info(this, "Processing next set of " + size);
				}
				Logger.info(this, "Modified "+ contentletsCounter + " Contentlets" );