question:

When saving  kettle the conversion, an error is reported Unexpected problem reading shared objects from XML file:null

Solution:

1. Find the C drive directory,C:\Users\Windows_login_name\.kettle

2. Open the  file and delete  the contents of the shared.xml tag <sharedobjects>

As shown below

<? xml version="1.0" encoding="UTF-8" ?> 
< sharedobjects > 
</ sharedobjects >

Finally try to save the conversion/job flow, it’s OK