Anonymous Support,
Data sources were in my original composite folder. I put them there. In hindsight, not a good idea. With the creation of the "_new" composite folder I tried to move the data sources into that folder but encountered issues with windows file path limits. My subsequent attempt to then move them to a "Common" data sources folder outside of the composite folder (i.e. where windows file path limits won't be encountered and to prevent issues like this in the future) failed with the error previously noted, "org.apache.poi.hssf.record.StringRecord". I will this try again, maybe just an anomaly.
Also, you stated the following: "Your original composite project folder with remain intact, but one with _new suffix will be created"
From the above comment, you are not suggesting the original composite folder be retained, right?
Regards,
Daniel.