fatal run-time error

[drea79]

Hello,

I´ve a very big problem.

My application get a fatal run-time error when I want to work with an open file, but only in debug-mode.

p_to_file = fopen (file, "ab");                                                                       

if(p_to_file != 0)                                                                                                                   

{

state = fseek (p_to_file, pos, SEEK_SET);  //Here it says that the Argument must be an open stream

fwrite (&value, sizeof(double), 1, p_to_file);                                       

            fclose (p_to_file);                                                                                                       

}

 

I don´t understand it!

When I run the .exe of my application there is no error and the var state is zero.

I tried to disable the message (SetBreakOnLibraryErrors(false)), but the error comes again.

Thanks

Andrea

[RobertoBozzolo]

I tried some tests with your code in Interactive execution window and although I got no error I noticed one detail that maybe can help you in your application. You may be getting a conflict between opening the file in append mode and setting the position after end-of-file indicator: in my test I was not able to set a position after end of file, even if I never had an error. Can you try opening the file in "rb+" mode and see if you get the same error? This file mode permits you to write even after end of file (file content between previous end-of-file and the new elements written remains undefined).

[drea79]

I tried it, but the error stays.

I don´t understand, why the exe runs.

Only when I debug my app. , I get the error.

Could it be, that my program is too large? I´ve over 7000 lines of code!

[jr_2005]

Do you have write permission on the file? Is it open for access by another program at the same time?

JR

[drea79]

I have write permission. No other program can open the file, when it´s already open.

I think it runs now. I renamed the file-pointer and now it works. But I don´t understand why!!!