The SWI-Prolog interactive FAQ

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This topic describes SWI-Prolog Frequently Asked Questions . This is the place to exchange problems you encounter using SWI-Prolog and judge relevant for other users.

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For other webs on SWI-Prolog, becoming a member or editing this web, see the Main web.

• Getting Started
  • Swidoc:quickstart.html -- Getting started quickly from the manual
  • Swidoc:IDE.html -- Initialising and Managing a Prolog project from the manual
  • LoadProgram -- How do I load a program?
  • LoadLibrary -- How do I load a file from the library?

• Help ...
  • AllOutput -- Prolog writes [x, y, z|...], I want the whole answer
  • ReConsult -- Where is reconsult(file)?
  • MorePrompt -- Prolog answers with more?

• Customizing Prolog
  • PlInitialisation -- Site and personal initialisation
  • CustomiseOptions -- What can be customized?
  • EnlargeStacks -- How do I enlarge the default stacks?
  • SyntaxErrorMessage -- Syntax error messsages with charachter index
  • PceFonts --- How do I change the fonts in PceEmacs and the debugger?

• Editing
  • WindowsAccelerators -- Help! I want normal ^X, ^C, ^V, ^S, ^P, etc.
  • BindEditor -- Binding to an editor
  • GnuEmacs -- Using SWI-Prolog with GNU-Emacs
  • PceEmacs -- Using XPCE

• How to ...
  • MakeLog -- Make a log of the session
  • ReadDynamicFromFile -- Read Prolog case data from a file
  • MakeExecutable -- Can I make an executable?

• Using SWI-Prolog on MS-Windows
  • WinCopy -- Cut/copy/paste from the plwin.exe console
  • WinSock2 -- File not found: ws2_32.dll (Windows 95)

• Using SWI-Prolog with C/C++
  • LibAndInclude -- Where are SWI-Prolog.h, libpl.{lib,dll,a,so}?
  • EmbedWinSetup -- How to setup Prolog for embedding in MS-Windows?
  • EmbedDLL -- How to embed SWI-Prolog in a DLL
  • FindResources -- [FATAL ERROR: Could not find system resources]
  • CppBinding -- Is there a true C++ binding?
  • ItfExamples -- Where do I find examples mixing C and Prolog?
  • SpitOutC -- Can I compile my whole project inc. kernal to C?

• Using SWI-Prolog with Java
  • JavaInterface -- A Java interface to Prolog

• Using Prolog for WEB-related tasks
  • PrologHttp and XpceHttp -- Using Prolog as web-server
  • RdfTools -- The semantic web
  • Swiorg:packages/sgml2pl.html -- processing SGML (HTML) and XML

• Common error messages and what to do
  • DynamicCode -- ERROR: No permission to modify static_procedure
  • UndefinedCode -- ERROR: Undefined procedure: name/arity.
  • MinusInHead -- Warning: Clauses of (-)/2 are not together in the source-file.
  • SingletonVar -- Warning: (file:line) Singleton variables: List
  • NoXpce -- ERROR: (file:line): Undefined procedure: pce_begin_class/2
  • CharEncoding -- ERROR: I/O error in write on stream XXX (Encoding cannot represent character)

• About datatypes
  • FloatType -- Representation and printing of floating point numbers

• Problems and Bugs are handled through Bugzilla. Some old issues are on the Problems web. E.g.:
  • CrashOnHalt -- plwin.exe crashing on halt/0 in Windows 95 and 98 ( fixed in 3.4.1)
  • ConsoleFont -- Text in console of plwin.exe is corrupted.

• Books and Web Material on Prolog are in PrologReading

At some point it would be useful if this site had an FAQ entry to say how this prolog is different from the GNU prolog.

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