Error - Execute Failed: Stream Closed

Hello,

I’m working in Version 5.2 of KNIME and was running the workflow below when I came across the error Execute Failed: Stream Closed.

There are 12 files in the folder that it is looping through. I tried running the same with half the files at a time and it seemed to run fine. I also tried adding a “Wait” node after the “variable loop start” node but was still coming across the same error. What does this error mean and how do I go about solving this?

Thank you!