Installing on Windows
Installing on UNIX
Installing on Macintosh
Licensing
If You Need Installation Assistance
IDL 7.1 Release Notes

There are two installation packages:
idl711win32_setup.exe for 32-bit Windows systems
idl711win64_setup.exe for 64-bit Windows systems



Note If you have a 64-bit Windows system, use the 64-bit installation package. It includes both 32-bit and 64-bit versions of IDL.



The installation program will un-compress files to a temporary space on your system drive. There must be sufficient space (500 MB) on your system drive before the installation process can begin. After installation, IDL 7.1 requires approximately 380 MB of disk space.
Windows XP and Vista are supported. (On 32-bit Windows XP systems, XP Service Pack 2 is required.)
You need Administrator privileges to install IDL. If you do not have such privileges, the installation process will fail because it cannot modify the system configuration.

Click on the link to download IDL 7.1.
In the Save As dialog, specify a location to save the executable file you are downloading (idl711win32_setup.exe for 32-bit Windows or idl711win64_setup.exe for 64-bit Windows) and click Save.
After the download is complete, go to the location where you saved the idl711win32_setup.exe or idl711win64_setup.exe file and double click on it to begin installing IDL.
Click Next to begin the installation process.
Read and accept the license agreement.
Choose the destination folder. The default installation path is C:\Program Files\ITT
Select the features to install. Typical installation features are pre-selected.
If you selected to install DICOM Network Services, you will be prompted about automatically starting the Network Services.
Begin the installation. Click on Next from the Start Copying Files dialog.
After installation, you are given the opportunity to license IDL. Licensing information for IDL 7.1 is provided here.
Release notes are included along with the IDL 7.1 installation, but see the IDL web site for late-breaking information.

IDL 7.1 requires approximately 675 MB of disk space.
If you plan to install IDL in a public directory, be sure you have root (or similar) permissions before running the installer.

Log into your account to print a prepaid UPS shipping label . Items must be shipped back within your specific return period.

Best Buy Black Friday & Holiday Return Policy (2025-2026) If you're snagging deals during Black Friday, you don't want to be stuck with tech that doesn't fit your needs. For the , Best Buy has implemented an Extended Holiday Return and Exchange Policy that gives you much more breathing room than their standard 15-day window. 🗓️ The Key Dates

Cell phones, cellular tablets, and hotspots must be returned within 14 days , regardless of when they were bought.

Most items bought between October 31, 2025, and December 31, 2025 .

Items like artificial trees and lights only have a 15-day return window from the date of purchase. Restocking Fees:

Items must be in "like-new" condition with all original contents and packaging to ensure a full refund. Best Buy Return & Exchange Policy

IDL 7.1 requires approximately 400 MB of disk space.
Mac OS 10.5.1 (or later) is supported.
The Apple X11 Window System must be installed from the Mac OS X CD-ROM (it is not installed by default).
If you plan to install IDL in a default directory (/Applications/), be sure you have administrator privileges before running the installer.

Best Buy Black Friday Return Policy -

Log into your account to print a prepaid UPS shipping label . Items must be shipped back within your specific return period.

Best Buy Black Friday & Holiday Return Policy (2025-2026) If you're snagging deals during Black Friday, you don't want to be stuck with tech that doesn't fit your needs. For the , Best Buy has implemented an Extended Holiday Return and Exchange Policy that gives you much more breathing room than their standard 15-day window. 🗓️ The Key Dates

Cell phones, cellular tablets, and hotspots must be returned within 14 days , regardless of when they were bought.

Most items bought between October 31, 2025, and December 31, 2025 .

Items like artificial trees and lights only have a 15-day return window from the date of purchase. Restocking Fees:

Items must be in "like-new" condition with all original contents and packaging to ensure a full refund. Best Buy Return & Exchange Policy

Set up your environment. Before running the licensing wizard, you must define several environment variables used by IDL. You can use predefined setup files included with IDL to define these variables.

For C shell:

source ITT_DIR/idl71/bin/idl_setup  

For Korn shell:

. ITT_DIR/idl71/bin/idl_setup.ksh  

For Bash shell:

. ITT_DIR/idl71/bin/idl_setup.bash  

where ITT_DIR is the main installation directory for IDL.

Start the Licensing Wizard. To start the License Wizard, enter ittlicense at the UNIX prompt.

Select Activate a license using the internet.
Click Next. The licensing wizard will launch a web browser and open the ITT Visual Information Solutions licensing web site.
Enter your username and password and click Submit. Follow the instructions on the web site to generate your license key.
After you generate your license key, your IDL 7.1 license information is displayed in the License Wizard. A copy is sent to your electronic mail address.



Note On some platforms, the license information is not automatically transferred to the License Wizard. If the information is not transferred, copy it from the web browser window and paste it into the License Wizard.



Click Next to write your license into the correct location on your computer.
The licensing wizard will display the location of your license file. Click Exit to close the wizard. Your copy of IDL 7.1 is now licensed and ready to use.