Reset index of internal table.

Hi,

I have a problem in resetting the index of internal table.

my table has five records.

once i reach third record i am checking for a condition , if that condition is successful i am executing a code.

once i am done with the execution i want to loop the internal table again from third record.

even if the change the sy-tabix to 3 , my internal table loop is reading fourth record .

can you let me know how to resolve this .

Regards,

Roby