Most probably, some library was not found (I see the handle is 0). If I open a browser on OGLWin32 OGLWin32 browse. In class definition, you see that handle is an instance variable. Then looks at instance variable assignment (menu assignment... or CTRL+a in class pane) I get these two methods

OpenGL>>destroy OpenGL>>initializeIn: bounds handle := self primCreateRenderer: 1 "B3DSoftwareRenderer" + 2 "B3DHardwareRenderer" + 4 "B3DStencilBuffer" x: bounds left y: bounds top w: bounds width h: bounds height. bufRect := bounds. handle ifNotNil:[glExt := OGLExtManager new ogl: self]. ^handle ifNotNil:[self]

If I browse implementors of primCreateRenderer:x:y:w:h:, I get OpenGL>>primCreateRenderer: flags x: x y: y w: w h: h <primitive: 'primitiveCreateRendererFlags' module:'B3DAcceleratorPlugin'> ^nil

It could be that your VM does not have the optional module B3DAcceleratorPlugin...

I see you are using Squeak 4.1, and don't remember if it was already available... But you could search for top menu bar item help->about this system. If you have it, in the resulting window, select VM Modules and report if B3DAcceleratorPlugin was loaded. Also select VM General and report your results.

If you don't have this tool, then try

SmalltalkImage current listBuiltinModules , SmalltalkImage current listLoadedModules.

and

SmalltalkImage current vmVersion.

Nicolas

Le 1 mars 2012 22:33, Chuck Hipschman ckhipschman@gmail.com a écrit :

I'm pretty new to squeak, please let me know if I should be looking for help elsewhere, (and where that would be :) TIA

I'm trying to follow a OpenGL tutorial posted on YouTube by user sparaig.  It's only 9 lines of code

(Installer repository: 'http://source.squeak.org/FFI')        install: 'FFI-Pools';        install: 'FFI-Kernel';        install: 'FFI-Tests'.

(Installer repository: 'http://www.squeaksource.com/CroquetGL')        install: '3DTransform';        install: 'OpenGL-Pools';        install: 'OpenGL-Core'.

OpenGL example  "this is where the trouble begins"

The transcript shows:

reading http://source.squeak..org/FFI... reading http://source.squeak.org/FFI... finding FFI-Pools... found FFI-Pools-eem.3.mcz... loaded reading http://source.squeak.org/FFI... finding FFI-Pools... found FFI-Pools-eem.3.mcz... finding FFI-Kernel... found FFI-Kernel.threaded-eem.25.mcz... loaded reading http://source.squeak.org/FFI... finding FFI-Pools... found FFI-Pools-eem.3.mcz... finding FFI-Kernel... found FFI-Kernel.threaded-eem.25.mcz... finding FFI-Tests... found FFI-Tests-ar.5.mcz... loaded reading http://www.squeaksource.com/CroquetGL... finding 3DTransform... found 3DTransform-ar.21.mcz... loaded reading http://www.squeaksource.com/CroquetGL... finding 3DTransform... found 3DTransform-ar.21.mcz... finding OpenGL-Pools... found OpenGL-Pools-jcg.9.mcz... loaded reading http://www.squeaksource.com/CroquetGL... finding 3DTransform... found 3DTransform-ar.21.mcz... finding OpenGL-Pools... found OpenGL-Pools-jcg.9.mcz... finding OpenGL-Core... found OpenGL-Core-hmm.15.mcz... loaded

and here's the output I get in the debugger

1 March 2012 2:12:18.278 pm

VM: Win32 - Smalltalk Image: Squeak4.1 [latest update: #9957]

SecurityManager state: Restricted: false FileAccess: true SocketAccess: true Working Dir C:\Documents and Settings\Chuck\My Documents\Squeak 4.1 Trusted Dir C:\Documents and Settings\Chuck\My Documents\Squeak 4.1\Chuck Untrusted Dir C:\Documents and Settings\Chuck\My Documents\My Squeak

OGLWin32(Object)>>error:        Receiver: an OGLWin32        Arguments and temporary variables:                aString:        'External function is invalid'        Receiver's instance variables:                handle:         0                bufRect:        0@0 corner: 400@400                glExt:  a *OGLExtManager                extensions:     nil                frontFace:      2305                maxPortalDepth:         5                changeTexture:  true                test:   false                timeStamp:      0                formManager:    nil                textureManager:         an OGLTextureManager                fontManager:    an OGLFontManager                shaderManager:  an OGLShaderManager                glListRegistry:         a WeakIdentityKeyDictionary()                isMirror:       false                inPortal3D:     false                camera:         nil                forceWire:      false                numVtx:         0                numPrims:       0                inGLBlock:      false                distance:       nil                harness:        nil                eventPointer:   nil                avatar:         nil                forcePick:      false                forceHilite:    nil                suppressPortals:        false                noSwap:         false                fogOn:  false                transparency:   1.0                matrixStack:    nil                portalDepth:    0                bufferObjects:  a Dictionary()

OGLWin32(Object)>>externalCallFailed        Receiver: an OGLWin32        Arguments and temporary variables:                errCode:        17        Receiver's instance variables:                handle:         0                bufRect:        0@0 corner: 400@400                glExt:  a *OGLExtManager                extensions:     nil                frontFace:      2305                maxPortalDepth:         5                changeTexture:  true                test:   false                timeStamp:      0                formManager:    nil                textureManager:         an OGLTextureManager                fontManager:    an OGLFontManager                shaderManager:  an OGLShaderManager                glListRegistry:         a WeakIdentityKeyDictionary()                isMirror:       false                inPortal3D:     false                camera:         nil                forceWire:      false                numVtx:         0                numPrims:       0                inGLBlock:      false                distance:       nil                harness:        nil                eventPointer:   nil                avatar:         nil                forcePick:      false                forceHilite:    nil                suppressPortals:        false                noSwap:         false                fogOn:  false                transparency:   1.0                matrixStack:    nil                portalDepth:    0                bufferObjects:  a Dictionary()

OGLWin32(OpenGL)>>glPixelStorei:with:        Receiver: an OGLWin32        Arguments and temporary variables:                pname:  3317                param:  4        Receiver's instance variables:                handle:         0                bufRect:        0@0 corner: 400@400                glExt:  a *OGLExtManager                extensions:     nil                frontFace:      2305                maxPortalDepth:         5                changeTexture:  true                test:   false                timeStamp:      0                formManager:    nil                textureManager:         an OGLTextureManager                fontManager:    an OGLFontManager                shaderManager:  an OGLShaderManager                glListRegistry:         a WeakIdentityKeyDictionary()                isMirror:       false                inPortal3D:     false                camera:         nil                forceWire:      false                numVtx:         0                numPrims:       0                inGLBlock:      false                distance:       nil                harness:        nil                eventPointer:   nil                avatar:         nil                forcePick:      false                forceHilite:    nil                suppressPortals:        false                noSwap:         false                fogOn:  false                transparency:   1.0                matrixStack:    nil                portalDepth:    0                bufferObjects:  a Dictionary()

OGLWin32(OpenGL)>>beginFrame        Receiver: an OGLWin32        Arguments and temporary variables:

Receiver's instance variables:                handle:         0                bufRect:        0@0 corner: 400@400                glExt:  a *OGLExtManager                extensions:     nil                frontFace:      2305                maxPortalDepth:         5                changeTexture:  true                test:   false                timeStamp:      0                formManager:    nil                textureManager:         an OGLTextureManager                fontManager:    an OGLFontManager                shaderManager:  an OGLShaderManager                glListRegistry:         a WeakIdentityKeyDictionary()                isMirror:       false                inPortal3D:     false                camera:         nil                forceWire:      false                numVtx:         0                numPrims:       0                inGLBlock:      false                distance:       nil                harness:        nil                eventPointer:   nil                avatar:         nil                forcePick:      false                forceHilite:    nil                suppressPortals:        false                noSwap:         false                fogOn:  false                transparency:   1.0                matrixStack:    nil                portalDepth:    0                bufferObjects:  a Dictionary()

--- The full stack --- OGLWin32(Object)>>error: OGLWin32(Object)>>externalCallFailed OGLWin32(OpenGL)>>glPixelStorei:with: OGLWin32(OpenGL)>>beginFrame  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - OGLWin32>>beginFrame [] in OpenGL class>>example BlockClosure>>ensure: OpenGL class>>example UndefinedObject>>DoIt Compiler>>evaluate:in:to:notifying:ifFail:logged: [] in SmalltalkEditor(TextEditor)>>evaluateSelection ...etc...