C++ :: Error Reading Character Of String?

I am trying to record some information in a file and allow user to delete a record. I am facing this message in Autos section of MVS (Error reading character of string). Here is the code:

int removeRecord(string name, int &row)//remove a record
{
const string data="database.txt";
fstream records;
records.open(data.c_str());
const string cpData="temp.txt";

[code].....

If I delete the any row (except last roe) it works but then add a copy of last record (sometimes fully sometimes partially) at the end of the file!! if i delete the last record it does not do anything.