Access Violation Reading location - C / C++ / MFC Discussion Boards

Re: Debug Assertion Failure

bhanu_850918-Sep-08 22:03

bhanu_8509

18-Sep-08 22:03

I created the variable using the wizard. When I try to show the dialog the error occurs.

Re: Debug Assertion Failure

Cedric Moonen18-Sep-08 22:13

Cedric Moonen

18-Sep-08 22:13

bhanu_8509 wrote:
When I try to show the dialog the error occurs

How are you trying to do that ? Please post some usefull code (using the "code block" tag).

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: Debug Assertion Failure

Rajesh R Subramanian18-Sep-08 22:01

Rajesh R Subramanian

18-Sep-08 22:01

bhanu_8509 wrote:
When I try to debug further, I just got struck up at the first line of the DoDataExchange and this is very strange to me.

You probably deleted a control after having created a control variable for it? May be DDX is trying to operate on a control that doesn't exist. Have you tried disabling that first line and compiling?

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Re: Debug Assertion Failure

bhanu_850918-Sep-08 22:10

bhanu_8509

18-Sep-08 22:10

If I comment then it shows on the next line.

Re: Debug Assertion Failure

Rajesh R Subramanian18-Sep-08 22:14

Rajesh R Subramanian

18-Sep-08 22:14

Why don't you try to analyse the problem? Have you verified that ALL the IDs that are listed in the DDX function actually exist?

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Re: Debug Assertion Failure

David Crow19-Sep-08 3:23

David Crow

19-Sep-08 3:23

bhanu_8509 wrote:
When I try to debug further, I just got struck up at the first line of the DoDataExchange and this is very strange to me.

This is an indicator that you have a call to DDX_Control() for a non-existant control. Why not comment them all out and note the result?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Debug Assertion Failure

Rajesh R Subramanian18-Sep-08 20:49

Rajesh R Subramanian

18-Sep-08 20:49

The debugger is not working?

Many are stubborn in pursuit of the path they have chosen, few in pursuit of the goal - Friedrich Nietzsche

.·´¯`·->Rajesh<-·´¯`·.
[Microsoft MVP - Visual C++]

Access Violation Reading location

T.RATHA KRISHNAN18-Sep-08 20:30

T.RATHA KRISHNAN

18-Sep-08 20:30

When I run a project, it shows exception. If I debug using F11 or F10, I can't go beyond that line where it shows exception. I can't see Disassembly also. What to do? Here is the code:

void TestAI::EnableShaders()
{
  dtCore::ShaderManager& sm = dtCore::ShaderManager::GetInstance();
  dtCore::ShaderProgram* sp = sm.FindShaderPrototype("TestShader", "TestShader");
  if(sp != NULL)
  {
   sm.AssignShaderFromPrototype(*sp, *m_Obj->GetOSGNode());
   mEnabled = true;
  }
 }

Exception occurs at the following line:
sm.AssignShaderFromPrototype(*sp, *m_Obj->GetOSGNode());

Here is the contents of Output Window.

First-chance exception at 0x00407336 in GUI.exe: 0xC0000005: Access violation reading location 0x00000020.

Unhandled exception at 0x00407336 in GUI.exe: 0xC0000005: Access violation reading location 0x00000020.

How to resolve these exception?

Re: Access Violation Reading location

_AnsHUMAN_ 18-Sep-08 20:38

_AnsHUMAN_

18-Sep-08 20:38

Do you check if your pointers are properly initialized. BTW what happens inside GetOSGNode function. Did you try to get into this while debugging?

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Access Violation Reading location

T.RATHA KRISHNAN18-Sep-08 20:43

T.RATHA KRISHNAN

18-Sep-08 20:43

Yes. There's the problem. If I press F11 or F10, I can't go beyond that line(Exception Dialog is shown). What to do?

Re: Access Violation Reading location

Cedric Moonen18-Sep-08 20:43

Cedric Moonen

18-Sep-08 20:43

Did you use a debugger to see if everything is correct ? What is the value of m_Obj ?

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: Access Violation Reading location

T.RATHA KRISHNAN18-Sep-08 21:02

T.RATHA KRISHNAN

18-Sep-08 21:02

Yes. It contains a meaningful value. It contains the following:

osg::ref_ptr<dtCore::Object> {_ptr=0x018285f8 } osg::ref_ptr<dtCore::Object>

Re: Access Violation Reading location

Rane19-Sep-08 1:14

Rane

19-Sep-08 1:14

T.RATHA KRISHNAN wrote:
GetOSGNode()

What happens inside the GetOSGNode() method?. Post us the code piece...

Regards,
Rane

Re: Access Violation Reading location

David Crow19-Sep-08 3:24

David Crow

19-Sep-08 3:24

T.RATHA KRISHNAN wrote:
Exception occurs at the following line:
sm.AssignShaderFromPrototype(*sp, *m_Obj->GetOSGNode());

Setting a breakpoint on that line, what is the value of sm, sp, and m_Obj?

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Setup package

AnithaSubramani18-Sep-08 19:54

AnithaSubramani

18-Sep-08 19:54

Hi all,

If Anybody creates setup package using InnoSetup,how to install a driver (eg.B100.inf).Pls help me.....

Thanks & Regards,

Anitha

Re: Setup package

Rane19-Sep-08 1:19

Rane

19-Sep-08 1:19

Have you seen this[^]

Regards,
Rane

Rounding float values

KASR118-Sep-08 19:03

KASR1

18-Sep-08 19:03

Is there any function to do the following operation in CPP?

Round(3.4) = 3
Round(3.5) = 4

Re: Rounding float values

Naveen18-Sep-08 19:13

Naveen

18-Sep-08 19:13

ceil() function?

ceil( 3.4 + 0.5 ) = 3;<br />
ceil( 3.5 + 0.5 ) = 4;

nave

[OpenedFileFinder] [My Blog]

Re: Rounding float values

KASR118-Sep-08 19:36

KASR1

18-Sep-08 19:36

see ceil(3.4) will return 4. please check.

Re: Rounding float values

Malli_S18-Sep-08 19:59

Malli_S

18-Sep-08 19:59

did u try any of

double floor(double x);
float floor(float x); // C++ only
long double floor(long double x); // C++ only
float floorf(float x);

-Malli...!

Re: Rounding float values

Naveen18-Sep-08 20:00

Naveen

18-Sep-08 20:00

..am sorry..

I was ment to say floor() function. Please you floor().

nave

[OpenedFileFinder] [My Blog]

Re: Rounding float values

KASR118-Sep-08 20:02

KASR1

18-Sep-08 20:02

Yes its working now. Thanks.

Re: Rounding float values

Cedric Moonen18-Sep-08 20:00

Cedric Moonen

18-Sep-08 20:00

You have to use floor() and add 0.5 to the number you want to round.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: Rounding float values

KASR118-Sep-08 20:02

KASR1

18-Sep-08 20:02

Working now.

Re: Rounding float values

Steve Echols18-Sep-08 19:59

Steve Echols

18-Sep-08 19:59

Try:

floor(x + 0.5)

- S
50 cups of coffee and you know it's on!
A post a day, keeps the white coats away!

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