How to download spool into internal table if the line width is having more than 255 characters in 4.7c version in abap

I am having a requirement to downlaod spool and send it in excel through email.Here the issue is the spool is having width more than 255 characters and the data downloading to internal table is having ONLY 255 characters and remaining is getting truncated.

FM i am using is

 CALL FUNCTION 'RSPO_RETURN_SPOOLJOB'

Please help me in resolving this issue.

Sateesh