Fatal error in writing Excel file

[eluser]Sudz[/eluser]
hi,
I am using PHPExcel library and writing excel file using database table records.
When i write more than 1000 records in the file
it gives me
Fatal error: Out of memory (allocated 1572864) (tried to allocate 2002945 bytes) .
What setting i need to do in php.ini.
Please anyone.

[eluser]toopay[/eluser]
ini_set manual

[eluser]cupidleomanoj[/eluser]
hi Sudhakar@CI,
I have to create a report in excel with codeigniter. I need to pass the values from database to excel sheet. I am trying with PHPExcel library, but i cant get the output. my script shows an error as

A PHP Error was encountered

Severity: Warning

Message: include(classes/PHPExcel.php) [function.include]: failed to open stream: No such file or directory

Filename: controllers/form.php

Line Number: 100

Fatal error: Class 'PHPExcel' not found in C:\xampp\htdocs\ci\application\controllers\form.php on line 105

I have followed the link "http://virusandlinux.baskoroadi.web.id/index.php/2008/11/tutorial-write-and-read-excel-files-with-codeigniter/"

can u please tell me how to solve this issue. it shows error in the include function.but i have done it correctly. can u please paste your code...