Checks to see if its first argument is an error. If the value isn't an error it is returned as-is, otherwise a secondary value is returned.
IfError(Primary Value As String, Error Replacement Value As String)
Primary Value is the value to check for an error.
Error Replacement Value is the value to use if the primary value is an error.
|IfError(DWVariableLength,2475)||Will return 2475 when the value coming from the variable Length is an error.|