Problem with pack_install

Hi,

while trying to install a pack on windows with the latest nightly build I got this error:

Welcome to SWI-Prolog (threaded, 64 bits, version 9.3.28-30-gf0150b98a)
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software.
Please run ?- license. for legal details.

For online help and background, visit https://www.swi-prolog.org
For built-in help, use ?- help(Topic). or ?- apropos(Word).

?- pack_install(bddem).
ERROR: c:/program files/swipl/library/http/http_open.pl:66:
ERROR:    Exported procedure socket:tcp_host_to_address/2 is not defined
ERROR: c:/program files/swipl/library/http/http_open.pl:66:
ERROR:    Exported procedure socket:tcp_connect/2 is not defined
ERROR: c:/program files/swipl/library/ext/clib/filesex.qlf:
ERROR:  module "files_ex" already loaded from "c:/program files/swipl/library/filesex.pl" (skipped)
ERROR: c:/program files/swipl/library/ext/clib/filesex.qlf: skipped module "files_ex" lacks ensure_directory/1
ERROR: load_files/2: No permission to load source `'c:/program files/swipl/library/ext/clib/filesex.pl'' (Non-module file already loaded into module prolog_pack; trying to load into files_ex)
ERROR: No permission to load source `'c:/program files/swipl/library/ext/clib/filesex.pl'' (Non-module file already loaded into module prolog_pack; trying to load into files_ex)
ERROR: In:
ERROR:   [17] files_ex:ensure_directory('c:/users/fabrizio/appdata/local/swi-prolog/pack')
ERROR:   [16] prolog_pack:pack_install_set([bddem- ...],'c:/users/fabrizio/appdata/local/swi-prolog/pack',[pack(bddem)]) at c:/program files/swipl/library/prolog_pack.pl:948
ERROR:   [13] toplevel_call('<garbage_collected>') at c:/program files/swipl/boot/toplevel.pl:1515
ERROR: 
ERROR: Note: some frames are missing due to last-call optimization.
ERROR: Re-run your program in debug mode (:- debug.) to get more detail.
ERROR: load_files/2: No permission to load source `'c:/program files/swipl/library/ext/clib/filesex.pl'' (Non-module file already loaded into module prolog_pack; trying to load into files_ex)
 ? 

It was due to a previous SWIPL version. After reinstalling it is now working