Exporting a Workpoint Job XML is successful but trying to import that XML fails because of the &# characters.
For example the exported XML shows
<var_name>PARTICIPANTS</var_name><var_value>[email protected][email protected]</var_value>
Identity Manager 14.4 and later
IM 14.2 included WorkPoint 3.52 where as IM 14.4 now includes WorkPoint 4.4 so behavior differences with WorkPoint Designer exports could be related to different WorkPoint versions versus IM itself.
Solution 1
In WorkPoint Designer edit and save the job so that you edit the participants attribute to delete the existing separator character  which shows up as a space in the interface (albeit with a greater width) and then insert a whitespace instead for each  character sequence. Now export the job and verify the absence of  characters in the XML file and then the XML file can be imported successfully.
Solution 2 -
In WorkPoint Designer export the job and manually edit the XML file to replace each  character sequence with a whitespace instead and then the XML file can be imported successfully.