Error when upload data file into BPC NW 10

Hi Experts

I´m facing the follow problem. I have a flat file (.csv) with 383K records, so when i try to upload file by "Upload Data" in "Data Manager", the system give a error and doesn´t load the file, But I divided the file in two o more, it´s uploaded.

So, please, anyone have any idea what's going when I try to load a file with more than 200K.

Thanks