Re: JPL error

Jan,

I am walking through the code now. I have the following prolog flag:

flag shared_object_search_path  : WINEPATH
Thanks!

Jerry


On Thu, Aug 1, 2013 at 8:44 AM, Jan Wielemaker <[email protected]> wrote:

> Weird things are going on.  My jpl.pl has no WINEPATH mentioned.  Where
> did you find that?  You can debug this by commenting in jpl.pl these two
> lines:
>
> % near start
> :- set_prolog_flag(generate_**debug_info, false).
>
> % near end.
> :- initialization(setup_jvm, now).
>
> The do
>
> ?- [library(jpl)].
> ?- gtrace, setup_jvm.
>
> and see what happens.  What exactly happens depends a lot on the platform.
>  Debugging this is a bit nasty because the OS tells you
> that some dependency is missing, but not which one :-(  You can use
> a DLL dependency walker to see what all the dependencies are.
>
>         Cheers --- Jan
>
>
>
> On 08/01/2013 02:18 PM, Jerry wrote:
>
>>  From inspecting jpl.pl more closely It looks like the foreign library
>> load
>> of jpl fails for some reason. The later messages are an attempt by
>> jpl.plto diagnose what the problem was. I probably need to take a
>>
>> closer look at
>> the jpl foreign source but I wonder what actual mechanisms are used when
>> the foreign code executes. Jpl.pl is looking at WINEPATH. It also seems to
>> try multiple methods to locate things using JAVA_HOME, windows registry
>> keys, etc. What is actually used in the foreign code? Perhaps my working
>> saved program has already performed steps in initializing jpl whereas the
>> non-working interpreted version is failing on an earlier step that the
>> saved version does not need to perform. How is initialization different
>> between a saved and non-saved program regarding JPL? The saved program
>> imported the JPL module prior to being saved.
>>
>> Thanks!
>> Jerry
>>
>>
>> On Thu, Aug 1, 2013 at 6:30 AM, Jerry <[email protected]> wrote:
>>
>>  Paul,
>>>
>>> This is what I get:
>>>
>>> 1 ?- jpl_new('java.util.Date', [], X).
>>>
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          '$open_shared_object'/3: The specified module could not be
>>> found.
>>> ERROR: Exported procedure jpl:jpl_c_lib_version/1 is not defined
>>> ERROR: jpl:jFindClass/2: Undefined procedure: jpl:jni_func/3
>>>     Exception: (10) jpl:jni_func(6, 'java/util/Date', @_G963) ?
>>>
>>>
>>> The thing is I have two versions of the same prolog application on one
>>> machine. One version is interpreted and the other saved with qsave from
>>> an
>>> earlier version of prolog. The first does not run yet the 2nd runs fine.
>>> I
>>> can rename either jvm.dll or java.dll and the expected error shows up.
>>> The
>>> other one makes no difference (always error). It is interesting to note
>>> that when I remove all path variables to jvm/java I get the jvm.dll popup
>>> and a message saying need to add java.dll to WINEPATH. When I add that to
>>> WINEPATH that error goes away and I get an error message saying the same
>>> thing about jvm.dll. When I add that to WINEPATH that error message goes
>>> away and the next error is Exported procedure jpl:jpl_c_lib_version/1 is
>>> not defined. That would imply  it found jvm.dll and the jvm.dll popup
>>> error
>>> happens in every case. I am wondering if the popup error message happens
>>> if
>>> any one of several problems occur. Here is the progression of errors as I
>>> fix specific errors:
>>>
>>> No java.dll or jvm.dll in WINEPATH
>>>
>>> % Added [C:\Program Files\Java\jre6\bin] to %PATH%
>>>
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          '$open_shared_object'/3: The specified module could not be
>>> found.
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          library `java' does not exist (Please add directory holding
>>> java.dll to %WINEPATH%)
>>> Warning: c:/program files/swipl/library/jpl.pl:**4637<http://jpl.pl:4637>
>>> :
>>>          Goal (directive) failed: jpl:initialization(setup_jvm,**now)
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:1:
>>>
>>>          Exported procedure jpl:jpl_c_lib_version/1 is not defined
>>> %  library(jpl) compiled into jpl 0.06 sec, 2,230 clauses
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>
>>>          jpl:jFindClass/2: Undefined procedure: jpl:jni_func/3
>>> Warning: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>          Goal (directive) failed: user:jpl_text_entry_demo
>>> % c:/Program Files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl compiled 0.06 sec, 2,236 clauses
>>> Welcome to SWI-Prolog (Multi-threaded, 64 bits, Version 6.4.1)
>>> Copyright (c) 1990-2013 University of Amsterdam, VU Amsterdam
>>> SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
>>> and you are welcome to redistribute it under certain conditions.
>>> Please visit http://www.swi-prolog.org for details.
>>>
>>> WINEPATH now has C:\Program Files\Java\jdk1.6.0_43\jre\bin
>>>
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          '$open_shared_object'/3: The specified module could not be
>>> found.
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          library `jvm' does not exist (Please add directory holding
>>> jvm.dll
>>> to %WINEPATH%)
>>> Warning: c:/program files/swipl/library/jpl.pl:**4637<http://jpl.pl:4637>
>>> :
>>>          Goal (directive) failed: jpl:initialization(setup_jvm,**now)
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:1:
>>>
>>>          Exported procedure jpl:jpl_c_lib_version/1 is not defined
>>> %  library(jpl) compiled into jpl 0.06 sec, 2,230 clauses
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>
>>>          jpl:jFindClass/2: Undefined procedure: jpl:jni_func/3
>>> Warning: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>          Goal (directive) failed: user:jpl_text_entry_demo
>>> % c:/Program Files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl compiled 0.06 sec, 2,236 clauses
>>> Welcome to SWI-Prolog (Multi-threaded, 64 bits, Version 6.4.1)
>>> Copyright (c) 1990-2013 University of Amsterdam, VU Amsterdam
>>> SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
>>> and you are welcome to redistribute it under certain conditions.
>>> Please visit http://www.swi-prolog.org for details.
>>>
>>> Notice the error message has changed. I now add C:\Program
>>> Files\Java\jdk1.6.0_43\jre\**bin\server to WINEPATH.
>>>
>>>
>>> ERROR: c:/program files/swipl/library/jpl.pl:**4637 <http://jpl.pl:4637>
>>> :
>>>          '$open_shared_object'/3: The specified module could not be
>>> found.
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:1:
>>>
>>>
>>>          Exported procedure jpl:jpl_c_lib_version/1 is not defined
>>> %  library(jpl) compiled into jpl 0.05 sec, 2,232 clauses
>>> ERROR: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>
>>>          jpl:jFindClass/2: Undefined procedure: jpl:jni_func/3
>>> Warning: c:/program files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl:23:
>>>          Goal (directive) failed: user:jpl_text_entry_demo
>>> % c:/Program Files/swipl/doc/packages/**examples/jpl/prolog/
>>> jpl_text_entry_demo.pl compiled 0.05 sec, 2,238 clauses
>>>
>>>
>>> The jvm.dll error goes away although I still get the jvm.dll popup error
>>> message.
>>>
>>> In your message you say that the registry is used to find things. Do you
>>> mean the windows registry? The documentation says to use CLASSPATH/PATH
>>> environment variables. Is there something in the windows registry that
>>> also
>>> comes into play?
>>>
>>> Thanks!
>>>
>>> Jerry
>>>
>>>
>>>
>>>
>>>
>>> On Wed, Jul 31, 2013 at 6:45 PM, Paul Singleton <[email protected]> wrote:
>>>
>>>  On 31/07/2013 20:59, Jerry wrote:
>>>>
>>>>  There may be a problem with JPL in the current stable release. I have
>>>>> been
>>>>> successfully using JPL since early July. Today, I uninstalled the 64
>>>>> bit
>>>>> windows version and reinstalled it as I was trying to determine if I
>>>>> had
>>>>> a
>>>>> good compiled version of my application. At this point my application
>>>>> was
>>>>> no longer able to initialize java. I have a compiled version from
>>>>> earlier
>>>>> today that works. That was compiled with a 64 bit prolog version that I
>>>>> downloaded earlier this month. I can run the earlier compiled version
>>>>> and
>>>>> then go to the jpl examples from the packages directory which do not
>>>>> run.
>>>>> That implies all the environment variables are pointing to the right
>>>>> places.
>>>>>
>>>>> Here is the error I am getting:
>>>>>
>>>>>
>>>> If you start a fresh instance of SWI-Prolog (console or win) and do
>>>>
>>>> ?- jpl_new('java.util.Date', [], X).
>>>>
>>>> (or anything which wakes JPL up), you should see a message from Jan
>>>>
>>>> % Added [C:\Program Files\Java\jdk1.7.0_17\jre\****
>>>> bin\client,C:\Program
>>>> Files\Java\jdk1.7.0_17\jre\****bin,C:\Program
>>>> Files\Java\jdk1.7.0_17\bin]
>>>>
>>>> to %PATH%
>>>>
>>>> What do you see, and does it make sense?
>>>>
>>>> I think Jan gets these paths from the registry; if you then see a popup
>>>> saying jvm.dll cannot be found, they may be wrong, perhaps because of an
>>>> incomplete un/reinstallation of a JRE?
>>>>
>>>> Paul Singleton
>>>>
>>>>
>>>>   ERROR: c:/program files/swipl/library/jpl.pl:****4637 <
>>>> http://jpl.pl:4637>
>>>>
>>>>> :
>>>>>           '$open_shared_object'/3: The specified module could not be
>>>>> found.
>>>>> ERROR: c:/program files/swipl/doc/packages/****examples/jpl/prolog/
>>>>>
>>>>> jpl_versions_demo.pl:1:
>>>>>           Exported procedure jpl:jpl_c_lib_version/1 is not defined
>>>>> %  library(jpl) compiled into jpl 0.05 sec, 2,232 clauses
>>>>> ERROR: c:/program files/swipl/doc/packages/****examples/jpl/prolog/
>>>>>
>>>>> jpl_versions_demo.pl:22:
>>>>>           jpl:jFindClass/2: Undefined procedure: jpl:jni_func/3
>>>>> Warning: c:/program files/swipl/doc/packages/****examples/jpl/prolog/
>>>>>
>>>>> jpl_versions_demo.pl:22:
>>>>>           Goal (directive) failed: user:jpl_versions_demo
>>>>> % c:/Program Files/swipl/doc/packages/****examples/jpl/prolog/
>>>>>
>>>>> jpl_versions_demo.pl compiled 0.05 sec, 2,238 clauses
>>>>> I also get a popup stating that jvm.dll cannot be found. As stated, the
>>>>> earlier compiled version runs fine. I looked for earlier versions of 64
>>>>> bit
>>>>> windows and the earliest I saw was from July 24th. I tried that one and
>>>>> got
>>>>> the same error.
>>>>>
>>>>> Any ideas?
>>>>> Thanks!
>>>>>
>>>>> Jerry
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