java.lang.RuntimeException

When I tried to open my workflow I got this message: 

java.lang.RuntimeException: Exception while accessing file: "/Users/gregoryhall/knime-workspace/Other/H+A_Operational_Report 1/Pull in CFAs (#118)/Join Address (#113)/Joiner (#108)/port_1/data.zip": invalid stored block lengths

None of the workflow would load.

My "fix" was to open the folder mentioned and delete that data.zip file, and then the workflow loaded with errors, but I was able to re-set the nodes and run the workflow. 

Does anyone have an idea why the above error would occur or what I could do to prevent? I am thinking to create a new workflow and copy the nodes. I have several wrapped metanodes and other metanodes inside of thos; I'm wondering if I need to unwrap them and not have metanodes inside of wrapped metanodes.

Thanks,

Greg

 

 

This sounds like this problem.