Created attachment 1 [details]
Comparison between JPL 32-bit and 64-bit, on 64-bit windows 7

Overview:
- When the query "use_module(library(jpl))" is entered the following error
occurs:

1 ?- use_module(library(jpl)).
%   library(error) compiled into error 0.00 sec, 18,264 bytes
%  library(lists) compiled into lists 0.00 sec, 46,152 bytes
ERROR: c:/program files/pl/library/jpl.pl:4637:
        '$open_shared_object'/3: %1 is geen geldige Win32-toepassing.

ERROR: c:/program files/pl/library/jpl.pl:4637:
        library `java' does not exist (Please add directory holding java.dll to
%LD_LIBRARY_PATH%)
Warning: c:/program files/pl/library/jpl.pl:4637:
        Goal (directive) failed: jpl:initialization(setup_jvm,now)
ERROR: c:/program files/pl/library/jpl.pl:4638:
        Exported procedure jpl:jpl_c_lib_version/1 is not defined
% library(jpl) compiled into jpl 0.06 sec, 724,128 bytes
true.

2 ?- 

- Steps:
1. Installed the 64-bit binary for the first time.
2. When I saw it didn't work I re-installed it, but that didn't help.
3. Then I uninstalled it and installed the 32-bit binary which did work.
4. Then I re-installed the 64-bit binary which still has the same issue (see
attachment).

- Actual results:
- Prolog generates an error but does not crash.
- Note: "geen geldige Win32-toepassing" means "not a valid Win32 application"

- Expected results:
- Just loading the library.

- Specs:
SWI-Prolog (Multi-threaded, 64 bits, Version 5.10.4), downloaded and installed
on June 19, 2011.
OS: windows 7 64-bit
Processor: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHZ 2.00 GHz
(if anything else is needed, let me know)

- Workaround:
- The 32-bit binary works like a charm (see attachment, I have now installed
both)

- Possible solutions:
- I'm no expert on this but the LD_LIBRARY_PATH error I recognize from when I
tried JPL on my Ubuntu system (which works fine now). Perhaps some
cross-platform problem?