Get-FileHash .\Multiwfn_3.8_bin_Win64.zip -Algorithm MD5
http://sobereva.com/multiwfn/ or directly to the mirror at: multiwfn 3.8 download
At the time of this writing, the direct link pattern is: Get-FileHash
md5sum Multiwfn_3.8_source.tar.gz Compare the output with the value listed on the download page. Any mismatch indicates a corrupted or malicious file. Dr. Tian Lu often signs releases with a PGP key. Import the public key from the official site and verify: Tian Lu often signs releases with a PGP key
gpg --verify Multiwfn_3.8_source.tar.gz.sig Despite being a mature version, users encounter a few recurring problems: Issue 1: "Multiwfn.exe is not recognized as an internal command" Solution: You must run Multiwfn from within its own directory or add it to your system PATH. Use cd C:\Multiwfn_3.8 first. Issue 2: Segmentation fault on Linux Solution: This often occurs due to a missing Fortran runtime. Install libgfortran :