Yes, there are two legitimate ways to obtain SoMachine V4.3 at no cost:

Avoid downloading software from sites that are not affiliated with Schneider Electric. Such sites may offer the software but could also bundle it with malware.

SoMachine V4.3 is ; it typically requires a paid license for long-term use.

: Supports all IEC 61131-3 languages, including Ladder (LD) and Structured Text (ST).

For older versions of Schneider software, you may need to contact a local Schneider Electric distributor for legacy software licensing, rather than relying on unauthorized third-party websites. System Requirements for SoMachine V4.3