I installed the SSW from the official site, then I tried downloading GOES data by using SSW, with the OS of Windows 11. However, some errors were confronted. The following is what shown in the Command-Line Interface when I entered "goes" and selected time interval and clicked the "Plot" button.
IDL> goes
% Compiled module: SOCK_GOES.
% ASTROLIB: Astronomy Library system variables have been added
% DEVICELIB: Added system variable !BCOLOR
% DEVICELIB: Added system variable !ASPECT
% GOES::READ: Please wait. Searching for GOES/SDAC data...
% Structure type not defined: IDLNETURL2.
% Execution halted at: SOCK_HEAD 108 E:\SSW\ssw\gen\idl\sockets\sock_head.pro
% HAVE_NETWORK 116 E:\SSW\ssw\gen\idl\sockets\have_network.pro
% GOES_SERVER 64 E:\SSW\ssw\gen\idl\synoptic\goes\goes_server.pro
% RD_GOES_SDAC 164 E:\SSW\ssw\gen\idl\synoptic\goes\rd_goes_sdac.pro
% GOES::READ 1262 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::GETDATA 305 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::PREPARE_PLOT 824 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::PLOTMAN 1169 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::EVENT 249 E:\SSW\ssw\gen\idl\synoptic\goes\goes__gui.pro
% GOES_EVENT 117 E:\SSW\ssw\gen\idl\synoptic\goes\goes__gui.pro
% WIDGET_PROCESS_EVENTS
% IDLNETURL2__DEFINE 254 E:\SSW\ssw\gen\idl\objects\idlneturl2__define.pro
% OBJ_NEW
% SOCK_HEAD 108 E:\SSW\ssw\gen\idl\sockets\sock_head.pro
% HAVE_NETWORK 116 E:\SSW\ssw\gen\idl\sockets\have_network.pro
% GOES_SERVER 64 E:\SSW\ssw\gen\idl\synoptic\goes\goes_server.pro
% RD_GOES_SDAC 164 E:\SSW\ssw\gen\idl\synoptic\goes\rd_goes_sdac.pro
% GOES::READ 1262 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::GETDATA 305 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::PREPARE_PLOT 824 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::PLOTMAN 1169 E:\SSW\ssw\gen\idl\synoptic\goes\goes__define.pro
% GOES::EVENT 249 E:\SSW\ssw\gen\idl\synoptic\goes\goes__gui.pro
% GOES_EVENT 117 E:\SSW\ssw\gen\idl\synoptic\goes\goes__gui.pro
% WIDGET_PROCESS_EVENTS
% $MAIN$
I have uninstalled IDL and SSW, then reintalled them. I also tried modifing "SSW_INSTR" in sswidl.bat. But it didn't work, the errors exist.