How to send a mail more than 255 characters in PDF format

Hi Experts

I am facing a problem sending an ALV list spool as an email attachment in PDF format. Here my problem is spool has morethan 255 characters, so the contents are trukated after 255.

I am using the FM "SO_NEW_DOCUMENT_ATT_SEND_API1" to send the email. Please give any good suggestion.

Thanks in advance

Praveen