# Use vshadow or copy from "Previous Versions" Copy-Item "C:\Data\active.sav" -Destination "C:\Temp\snapshot.sav" The snapshot is a point-in-time copy, allowing you to read and modify without disrupting the live lock. Warning: Direct binary edits to an active SAV file can corrupt the file beyond recovery. Only attempt if you understand the SPSS file specification.
A Python script is reading the SAV file but you need to modify values. How To Edit Active Sav File
spss_doc.Close(False) # False = do not save again # Use vshadow or copy from "Previous Versions"