To achieve a "better" download, consider integrating these high-performance libraries:

It seems you are referring to (or perhaps meant idlxls / xls2dss ), which is a utility often associated with HEC-DSS (Hydrologic Engineering Center's Data Storage System) used in hydrology and water resources engineering.

Assuming you are looking to improve how you download or export data from HEC-DSS into Excel (XLS), here is a guide on how to do it —avoiding the common pitfalls of older tools like idsxls .