Lahey/GNU Fortran - 'Lassen' Edition

Subscriber Update

The setup programs below are for owners of 'Shasta' (1.0) or 'Lassen' (1.1)  that have a product support subscription with an expiration date after July 1, 2014 (otherwise it will install as a trial).

To install or update, download one of the the choices below and run it on your Windows PC.

Maintenance Update

The update program below will update the current version of your product to the latest maintenance release version. This is only for owners of the same minor numbered version of the product with an unexpired product support subscription. To update, download the update program below and run it in Windows.

The version number is in the form major.minor.update where the maintenance update version is the update number. The update program will update your product from any previous maintenance version.

To digress to a previous version, the entire product must be uninstalled, then reinstalled by running the original setup program. Then, the update program for the desired maintenance release can be run. (Saving downloaded updates is recommended for this purpose. Previous versions can also be requested from

  • LG Fortran v1.1.2 Update (56 MB). For updating 'Lassen' (version 1.1.x). Last updated May 28, 2015.

  • Please read the Release Notes before downloading and installing the update program.