EDI Demand Entry - Parameter Name Error

I’ve seen other posts on here about this error related to jobs but not to an EDI Demand Import. Ran a trace log with full details but nothing explains which parameter name and what the expected value should be? Anyone else familiar with this or advice on how to track down the specific parameter it is referring to?

Program Ice.Services.Lib.RunTask raised an unexpected exception with the following message: RunTask:
System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
Parameter name: Number of characters must be greater than zero