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Running Multiple Versions of Xilinx Software
To maintain multiple versions of software, read the following document for information about which configurations are supported, about setting up your user environment, and about switching among software versions:
http://www.xilinx.com/xlnx/xil_ans_display.jsp?getPagePath=8915
The ISE 7.1i installer does not allow you to install to a directory that contains an older version of Xilinx® software. You must either uninstall the older version, or install ISE 7.1i to a different location. If you attempt to install ISE 7.1i over ISE 6.3i, the installer gives you the option of automatically uninstalling older versions of the Xilinx software before continuing.
Note: To retain your ISE installation and also install ISE 7.1i, select the option to install in a different directory.
Note: Before uninstalling, be sure you have moved any project files you want to keep outside your Xilinx installation directory structure, or it will be deleted.
See the uninstall information later in this chapter for issues when running multiple installations.
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