Errors while loading a hierarchy through flat file

Hi All,

I have prepared a flat file to load the data for a characteristic (location) hierarchy and trying to load it.

its throwing an error again and again though it loaded fine when with less no. of records (25 earlier and 75 now)

error coming up is

boldData records for package 1 selected in PSA - 1 error(s)bold

could any one please suggest the possible errors and troubleshooting points please?

Thank you

Tanu