1. when i run the following command : java org.xmlBlaster.client.reader.GetMessage -oid __cmd:?freeMem it report Got 0 messages for '__cmd:?freeMem' 2. To modify the bug in file GetMessage.java Change " GetKey xmlKeyWr = new GetKey(glob, xmlKey, queryType);" To " if (oidString !=null ) { xmlKeyWr= new GetKey(glob, xmlKey); } else { xmlKeyWr = new GetKey(glob, xmlKey, queryType); } "