File Compression in QUARTUS II 9.1SP2

Hi scanner1306,

Which version do you have installed on your PC

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I am currently using quartus ii software build 350 03/24/2010 sj web edition to design my Cyclone II based projects.

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You didn't tell us which version you are using. This is just the build number, the date of the build and it tells us that you use the Web Edition.

Are you sure you have Quartus II 9.1 installed?

Maybe you can install Quartus II 9.1 SP2 directly:

https://www.altera.com/download/software/quartus-ii-we/9.1sp2 (https://www.altera.com/download/software/quartus-ii-we/9.1sp2)