Error Message: Zip Task: Invalid source

Error Message: "Zip Task: Invalid source"

Action:
When executing a package, that includes Zip Task component and I am using a variable to specify the source each time through the enumeration inside of a Foreach loop, I get the following error: 

Error Message:
"Zip Task: Invalid source"

Solution:
             
            It is possible this error occurred, because that variable did not have a default File Path name entered.