Error during extraction when update mode=D in RSA3

HI,

One of my delta load to dso from R3 is taking too much time.So when i checkd in RSA3 for this DATA SOURCE for update mode =D.

I entered same selection as used in Infopackage.

i am getting error "error occured during extadction".

and for update mode= FULL F .its extarction for same conditions.

any idea on this ??

Thanks

Nilesh