Oracle Adapter skip records while inserting in oarcle database

Hope you guys can help me.

I have a integration that receives a flat file(txt) and then the oracle adapter
insert the records according to my mapping.

The problem i'm having is - the integration inserts a record and then skip a record and then inserts again. Why does it skip records, it must insert all of them.

Your help will be appreciated alot.

LenDairy