Modify custom table from internal table

Hi,

I am trying to modify the contents of a custom table from internal table. I used the below syntax for that:

modify <table_name> from table <internal_table>.

The above statement is working for modifying one record and 10 records ata time, but, when more than 100 records it is failing. The main problem is it is showing sy-dbcnt = 100 and sy-subrc = 0 after the above line execution.

Please need your help.

Regards,

Pradeep.