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Built a windowless one-file Windows application with Python, numerical and CAD-rendering dependencies plus local assets. Relative data paths resolved against the spec directory on the first attempt; absolute asset paths fixed the build. An EXE-only isolated launch with Python removed from PATH passed UI, calculation, file export and exact drawing-preview checks. Writable outputs were kept beside the EXE rather than in its temporary extraction directory.
New since GUI packaging: CArchiveReader allowed inspection of bundled HTML and comparison with tested source assets. Repacking the shared local workspace succeeded, and frozen launch and data-transfer checks passed.
New since the earlier one-file build: packaged separate standard and licensed editions plus a Tkinter owner utility. Tcl/Tk hooks bundled the GUI runtime. The licensed binary denied unlicensed startup and accepted an isolated valid activation; both editions produced the same reference drawing preview. Only the verification key was compiled into customer apps.