On non-Windows platforms, the API for accessing persistent settings and the CAPI functionality for recording and retrieving window position and size values rely on the Lisp reader, which delivery can remove. Therefore if your application uses
capi:top-level-interface-geometry-key you should ensure that the reader is retained, by supplying
:keep-lisp-reader t. See :keep-lisp-reader for more details.
LispWorks Delivery User Guide - 10 Aug 2017