Maximum Image File Size?

[abend]

Windows 7 64-bit (16 GB memory)
Scribus 1.6.1
Image cache is not enabled.

I created a new doc, inserted an image frame, and dragged a file name onto the frame (TIF file).
File size 1.5 GB.  Scribus did not display the image.  It displayed the file's name.

Delete the frame, and insert a new frame.
Dragged a different file name.
File size 1.1 GB.  Scribus displayed the image.

So somewhere between 1.1 GB and 1.5 GB I hit a limit.

Is there a max image file size somewhere?  Is it adjustable?

[mottechy]

Tried the settings under
Preferences > Image Cache ?