XXL_FUL_API for more than 255 chars

HI All,

we are trying to download an excel file using XXL_FULL_API but it doesn't downloads data more than 255 characters in a column. After 255 it gives some garbage/unreadable values in that column.

How can this be resolved. We tried using another FM to download excel onto PC and then opening it via execute in cl_gui_frontend services.

Can we do something without changing XXL_FULL_API. Is this issue with SAP or with this FM. Can this be resolved with some note?

Thanks

Jitender