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To install GX_Simulator as part of the SSW tree one should select the GX_Simulator package on the [http://www.lmsal.com/solarsoft/ssw_install.html Solarsoft installation form] and follow the general installation instructions.

Alternatively, one may chose to upgrade an already existing SSW installation, using the IDL command line

<pre>IDL> ssw_upgrade,/gx_simulator,/gen,/spawn,/loud,/passive_ftp</pre>

However, if the latest option is chosen, one should make sure that sswidl.bat (on Windows platforms) or cshrc (on Unix or Mac platforms) scripts are properly updated such as to include gx_simulator in the SSW_INSTR path declaration, i.e.

<pre>set SSW_INSTR=gx_simulator [...]</pre>

where [...] denotes any other SSW packages installed

In addition, the GX_Simulator installation process may require a few additional OS-specific setup steps.