"*.hexout" file changing on every compilation. How to avoid it?

Hi All,

I am using quartus 9.1 350 build (32 bit version) , I am compiling a design, after every compilation "*.hexout" file generated is changing as compared to previous "*.hexout" file.

Kindly let me know, what settings in the tool I need to change to generate same "*.hexout" file irrespective of number of compilation.

Note : I did not change anything in the design ,I am just compiling same design multiple times.

Please take your valuable time in replying to the thread.

Thanks in advance.