Problem in running an application outside IDE

Paramesh · #1 06-Feb-2006, 04:44

Friends,

I have built a C application using MS VC++. When i run the program directly from the IDE, it runs.
But when i double click the exe file, MS Send error report dialog box comes, and says that the application has performed an illegal operation!

Can anyone tell me what is happening here?
I have linked my file to some external libraries.
Is that the problem involved here?

I have no idea.
Thanks...
Paramesh.

kobi_hikri · #2 06-Feb-2006, 05:30

Quote:

Originally Posted by Paramesh

I have linked my file to some external libraries.
Is that the problem involved here?

Very likely.
I encounter the same problem when running an application without the required dll's.

Kobi.

Paramesh · #3 06-Feb-2006, 06:33

Quote:

Originally Posted by kobi_hikri

Very likely.
I encounter the same problem when running an application without the required dll's.

Kobi.

But how does it run from the IDE?
The dlls are present in the computer isnt it?

Well. How do i solve this problem?

Thanks Kobi...

nkhambal · #4 06-Feb-2006, 07:29

Look for the path that your IDE sets for searching the dynamically linked libraries. On *nix, its set using environment variable called, LD_LIBRARY_PATH. When a program runs (outside the IDE, in your case), the dynamically linked libraries are searched under the given path speficed by the LD_LIBRARY_PATH or some related variable under windows. If the libraries or DLLs are not found under these paths or if the variable is not set in your current execution space, program fails.

kobi_hikri · #5 06-Feb-2006, 07:50

Quote:

Originally Posted by Paramesh

Well. How do i solve this problem?

Simply create a library for the included files that are needed for your application.
Lets say your application resides under c:\Paramesh
So, put all the dll's under c:\Paramesh\RunTime
Now, from within your code, include the dll's from the library \RunTime
So now, your application will look one folder "Deeper" for the dll's, from it's currently being used.

Kobi.

Paramesh · #6 06-Feb-2006, 08:27

I use MS VC++ in windows. (

)

I am linking to only static libraries, I tried it in the same operating system.

I finally traced out where the error was, and i found that it was because of the memory allocation.

If i allocate only less memory, it works..
But if i try to allocate more, the error message comes up.

For example, if i have the memory allocated for 2 floats, it works..
But if i try to allocate 10 floats, it didnt work!

Well. What may be the problem now?
The files are linked correctly because it worked for less memory.
But for more memory, it didnt work.

So, it is not a linker problem i think.

Thanks for your help friends....

LuciWiz · #7 06-Feb-2006, 08:36

Hi, Paramesh.

This problem is very interesting.
Could you please give some source code - unless it is very long.
For instance, I would like to know if the floats you allocate are created in the memory space of the executable or in that of the libraries.

Thanks,
Lucian

Paramesh · #8 06-Feb-2006, 08:52

Thanks Lucian!

The source code is too long to be posted here...
I'll post a part of my source code:

CPP / C++ / C Code:

    extern int M;

    float **Image_in_Row = new float*[M];

    for(int i = 0; i < M; i++) {
        Image_in_Row[i] = new float[77760];
        std::cout<<"Memory allocated for Row: "<< (i+1) << std::endl;
    }

It only allocated the memory for the first time...
The next time, it doesnt..

Thank you..
Paramesh.

LuciWiz · #9 06-Feb-2006, 09:04

So, what value does M ussually have? I tried this program several times without any problem (but without any outside dependencies, either):

CPP / C++ / C Code:

const int M = 5;

int main()
{
	float **Image_in_Row = new float*[M];

	
	for(int i = 0; i < M; i++) 
	{
		Image_in_Row[i] = new float[77760];
		std::cout << "Memory allocated for Row: " << (i+1) << std::endl;
	}

	for(int i = 0; i < M; i++) 
	{
		delete Image_in_Row[i];
	}
	delete [] Image_in_Row;
	std::cin.get();
	return 0;
}

davekw7x · #10 06-Feb-2006, 09:30

Quote:

Originally Posted by LuciWiz

So, what value does M ussually have?

A more relevant question might be: What value does M have when your program tries to allocate storage:

CPP / C++ / C Code:

   extern int M;
.
.
.
    std::cout << "M = " << M << endl; // Make the program tell you the value of M
    float **Image_in_Row = new float*[M];

    for(int i = 0; i < M; i++) {
        Image_in_Row[i] = new float[77760];
        std::cout<<"Memory allocated for Row: "<< (i+1) << std::endl;
    }

Put this kind of output statement in your actual program, not just the test loop.

See if the program thinks M is what you think it should be.

It may just happen that M is not initialized the way that you think it is.

For example, uninitialized variables may have different values in programs run from the IDE than they do when run from a command line.

Regards,

Dave

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