Open Hub Extract in .txt file

Hi Expert,

A abc.txt file is getting populated as a target of open hub. That file is populated through a process chain. DTP monitor screen shows that output data volume is around 2.8 million everyday, but I am not been able to find data more than 1250000. Every time whatever be the data target in dtp monitor it shows me 1250000 in the txt file. Is there any limitation on the number of rows in .txt file.

Please help.

Regards,

Snehasish