Download the files for CML-Free from Cisco's Software Central (SWC) site. You do not need to download all of the files from a CML- Cisco DevNet
You can obtain the latest stable or "patched" refplat ISO files through official Cisco channels based on your license type: cisco cml refplat iso download patched
CML is updated frequently to support new hardware platforms and software features. Using a static, patched version locks you out of these updates and official support from Cisco. Download the files for CML-Free from Cisco's Software