BODS data extraction from ECC

Hi

I have been trying to extract MARA table from ECC but I get the following error:

Error calling RFC function to get table data:
<RFC_ABAP_EXCEPTION-(Exception_Key: DATA_BUFFER_EXCEEDED, SY-MSGTY: E,
SY-MSGID:

Also can you advise me how you configure the Execution Properties in BODS. I want the Monitor Sample rate in rows and not in seconds.

I hope some of you must have come across this.    Please advise me how you overcame this?

Thanks in advance.