If you disable saving via enableSaving, then the saveGame command also stops working, fx.,
enableSaving [false, false]; saveGame; // does not save
Wiki states "enable: Boolean - allow manual saving", "manual saving" I'd imagine means the "SAVE" button in the menu, nothing related to the actual scripted "saveGame" command.
This can be worked around by enabling saving, and executing "saveGame" a frame later, but just wondering if this is intended or a bug.