Register using your institutional email ID ( .ac.in , .edu , .gov ). Personal emails like Gmail are rejected.
Run the license generation script:
cd ISM_6.2/licences ./get_hostid # Outputs a 12-character code Email this hostid to licensing@cdac.in . Within 2-3 working days, you’ll receive a license.dat file unique to your machine. If you have already downloaded a random .zip from the internet and are facing errors, here’s how to troubleshoot: Error 1: "License file corrupt or expired" Cause: The license.dat contains a hardcoded expiry date (e.g., EXPIRES=31-DEC-2020 ). Fix: Legitimate solution – request a renewal from CDAC. Illegitimate "solutions" involving system date changes will break other software. Error 2: "Cannot open /usr/local/ism_6.2/licences/license.dat" Cause: The binary is looking for an absolute path. Fix: Create a symbolic link or set the environment variable: ism 6.2 software licences from cdac.zip
Download the file named ISM_6.2_CDAC_<build_date>.zip . The internal folder structure will contain the licences directory. Register using your institutional email ID (
Fill out the Material Transfer Agreement (MTA). This is a digital form where you declare that the software will not be used for commercial purposes. Within 2-3 working days, you’ll receive a license
Introduction In the world of computational material science and theoretical chemistry, few tools are as revered for specific niche applications as the ISM (Intermolecular Separation Method) software . Developed primarily for analyzing intermolecular interactions, electron densities, and molecular docking simulations, ISM has become a staple in many Indian research laboratories. The version ISM 6.2 represents a significant leap in parallel computing capabilities and user-friendly scripting.