I have faced the peculiar problem. Please have a look at the following piece of code.
SPLIT WA_EXTAB-LINE AT ',' INTO WA_FILE-MATNR
Here WA_EXTAB-LINE is of character type of length 2000.
When i am uploading an excel file, the length of the last field is 600.
The problem is before pressing F5 at SPLIT i just saw the contents of WA_EXTAB-LINE. here i am not getting the full text of the last field of the excel sheet.