Windows error 0x00000072, 114

Detailed Error Information

INVALID_TARGET_HANDLE[1]

MessageThe target internal file identifier is incorrect.
Declared inwinerror.h

This appears to be a raw Win32 error. More information may be available in error 0x80070072.

ASSIGN_DRIVE_LETTERS_FAILED[2]

This is a Blue Screen of Death stop code. More information is available in the Knowledge Base article Bug Check 0x72: ASSIGN_DRIVE_LETTERS_FAILED.

HRESULT analysis[3]

This is probably not the correct interpretation of this error. The Win32 error above is more likely to indicate the actual problem.
FlagsSeveritySuccess

This code indicates success, rather than an error. This may not be the correct interpretation of this code, or possibly the program is handling errors incorrectly.

Reserved (R)false
OriginMicrosoft
NTSTATUSfalse
Reserved (X)false
FacilityCode0 (0x000)
NameFACILITY_NULL[3][1]
DescriptionThe default facility code.[3][1]
Error Code114 (0x0072)

Possible solutions

5

Are Sub-Arrays Guaranteed to be Allocated Linearly?

c++
arrays
linear
memory-layout
static-allocation

Are Sub-Arrays Guaranteed to be Allocated Linearly?

Yes. Whether the elements of the array are sub-arrays or non-array objects, they are guaranteed to be stored contiguously in memory.

For completeness, here is the standard quote:

[dcl.array]

  1. [snip] An object of array type contains a contiguously allocated non-empty set of N subobjects of type T. [snip]

There is no exception for the case when T is an array.


So we know this isn't guaranteed to be the case for const char[4].

On the contrary, we do know that this is guaranteed for char[4] objects just like it is guaranteed for other types.

For example: const char first[] = "foo"; char foo[][4] = {"bar", "foo", "", "baz"}

first would be stored like this in memory:

{'f', 'o', 'o', '\0'}

foo would be stored like this:

{'b', 'a', 'r', '\0', 'f', 'o', 'o', '\0', '\0', '\0', '\0', '\0', 'b', 'a', 'z', '\0'}

So why would you say this is guaranteed for ints?

It is guaranteed for int[4], char[4] and any other type that you can imagine.

answered on Stack Overflow Jun 27, 2016 by user2079303 • edited Jun 27, 2016 by user2079303
3

'Access violation' using fstream

c++
fstream
visual-c++-2010

You need

 file1.read((char*)&r, sizeof(char));

or

 file1.read(&r, sizeof(char));
answered on Stack Overflow May 15, 2014 by user3344003 • edited May 15, 2014 by user3344003
3

Are Sub-Arrays Guaranteed to be Allocated Linearly?

c++
arrays
linear
memory-layout
static-allocation

From the C language standard ISO/IEC 9899 §6.2.5 Types/p20 (Emphasis Mine):

An array type describes a contiguously allocated nonempty set of objects with a particular member object type, called the element type.

Also from the C language standard ISO/IEC 9899 §6.5.2.1/p3 Array subscripting (Emphasis Mine):

Successive subscript operators designate an element of a multidimensional array object. If E is an n-dimensional array (n >= 2) with dimensions i x j x . . . x k, then E (used as other than an lvalue) is converted to a pointer to an (n - 1)-dimensional array with dimensions j x . . . x k. If the unary * operator is applied to this pointer explicitly, or implicitly as a result of subscripting, the result is the pointed-to (n - 1)-dimensional array, which itself is converted into a pointer if used as other than an lvalue. It follows from this that arrays are stored in row-major order (last subscript varies fastest).

From the above we can conclude that a 2D array is actually a 1D array stored in row-major order.

Consequently, it's safe to assume that elements of a sub-array are stored contiguously in memory.

answered on Stack Overflow Jun 27, 2016 by 101010
3

How to catch system.xml.xmlexception

c#
.net
visual-studio
windows-phone-8

There must be some problem with the XML provided by e.Result. Details about this might be in the XmlException message but you only included part of the stack trace.

You will have to figure out what the problem is in the first place and you will probably have to add some logging of what happens BEFORE you call XDocument.Load if you are unable to reproduce the problem on your own system.

You can also add an exception handler but that does not fix the problem but makes your app more robust and allows it to provide a slightly better user interface if something unexpected happens. What you have done is adding an exception handler around the calls to the WebClient methods but you are not catching exceptions thrown by the handler for client.OpenReadCompleted. This is an asynchronous callback that will execute on a threadpool thread, and any uncaught exceptions thrown by this thread will terminate your app.

You need to handle the exception with code like this:

client.OpenReadCompleted += (sender, e) =>
{
    try
    {
        if (e.Error != null)
        {
            return;
        }
        else
            ....
    }
    catch (Exception ex)
    {
        .... log and report the exception to allow the app to continue
    }
 }

And if you decide to add logging to your app it will be very useful to you if you log the entire text returned by ex.ToString(). This will give you a good textual description of the problem including inner exceptions and full stack traces.

answered on Stack Overflow Jul 3, 2014 by Martin Liversage • edited Jul 3, 2014 by Martin Liversage
3

OpenMP: Access violation and other errors

c
visual-studio
parallel-processing
openmp

The code is too big for a proper testing and the use of global variables really doesn't help to figure out the data dependencies. However I can just make a few remarks:

  • i is declared shared whereas it is the index of the parallelised loop. This is wrong! If there is a variable that you really want to be private in a omp for loop, it is the loop index. I didn't find anything clear about that in the OpenMP standard for C and C++, whereas for Fortran, the loop index (and the ones of all enclosed loops) is implicitly privatised. Nonetheless, the Intel compiler gives an error while attempting to explicitly declare shared such an index:

    sharedi.cc(11): warning #2555: static control variable for parallel loop
          for ( i=0; i<10; i++ ) {
                           ^
    sharedi.cc(10): error: index variable "i" of for statement following an OpenMP for pragma must be private
          #pragma omp parallel for shared(i) schedule(static)
          ^
    compilation aborted for sharedi.cc (code 2)
    

    by the mean-time, gcc version 5.1.0 doesn't emit any warning or error for the same code, and acts as if the variable had been declared private... I tend to find Intel's compiler's behaviour more reasonable, but I'm not 100% sure which one is correct. What I know however is that declaring i shared is definitely a very very bad idea (and even a bug AFAIC). So I feel like this is a grey area where your compiler may or may not do a sensible job, which could all by itself explain most of your problems.

  • You seem to output your data into files, which names might conflict across threads. Be careful with that as you might end-up with a big mess...

  • Your printing is very likely to be all messed-up. I don't know what importance you put in that, but that won't be pretty the way it is written for now.

In summary, your code is just to tangled for me to get a clear view on what's happening. Try to address at least the two first points I mentioned, it might be sufficient for getting it to "work". However, I couldn't encourage you enough to clean the code up and to get rid of your global variables. Likewise, try to only declare your variables as late in the sources as possible, since this reduces the need of declaring them private for OpenMP, and it improves greatly readability.

Good luck with your debugging.

answered on Stack Overflow Oct 7, 2015 by Gilles
2

How to catch system.xml.xmlexception

c#
.net
visual-studio
windows-phone-8

Normally is good practice to do catch(Exception), in your case catch(system.xml.XmlException). However put a try-catch inside your else block because this is an asynchronous event and if occurs some exception inside that exception will be not catched:

try 
{
    WebClient client = new WebClient();
    client.OpenReadAsync(new Uri(Url, UriKind.Absolute));
    client.OpenReadCompleted += (sender, e) =>
    {
        if (e.Error != null)
        {
            return;
        }
        else
        {
           try
           {
              System.Xml.Linq.XDocument xmlDoc = XDocument.Load(e.Result);
              IEnumerable<string> strTestURL = from node in xmlDoc.Descendants("url") select node.Value;
              IEnumerable<string> strTestDescription = from node in xmlDoc.Descendants("copyright") select node.Value;
              IEnumerable<string> strTestDate = from node in xmlDoc.Descendants("enddate") select node.Value;
              string strURL = "http://www.bing.com" + strTestURL.First();
              strURL = strURL.Replace("1366x768", "800x480");
              Global.URL1 = strURL;
              Global.URLs[i] = strURL;
              Global.Descriptions[i] = strTestDescription.First();
              Uri Uri = new Uri(Global.URLs[i], UriKind.Absolute);
              Imageallgemein.Source = new BitmapImage(Uri);
              Imageallgemein.Tap += new EventHandler<System.Windows.Input.GestureEventArgs>(onImageTap);
              Imageallgemein.Hold += new EventHandler<System.Windows.Input.GestureEventArgs>(onImageTap);
              Description.Text = Global.Descriptions[i];
              string Year = strTestDate.First().Substring(0, 4);
              string Month = strTestDate.First().Substring(4, 2);
              string Day = strTestDate.First().Substring(6, 2);
              Date.Text = Day + "." + Month + "." + Year;
           }
           catch (XmlException)
           {
                MessageBox.Show(AppResources.Abort, AppResources.msgBoxUrlLoadError, MessageBoxButton.OK);
           }
        }
    };
}
catch (Exception)
{
    MessageBox.Show(AppResources.Abort, AppResources.msgBoxUrlLoadError, MessageBoxButton.OK);
}
answered on Stack Overflow Jul 3, 2014 by Ninita
1

Problem converting endianness

c++
xcode
endianness
openal

there's a whole range of functions called "htons/htonl/hton" whose sole purpose in life is to convert from "host" to "network" byte order.

http://beej.us/guide/bgnet/output/html/multipage/htonsman.html

Each function has a reciprocal that does the opposite.

Now, these functions won't help you necessarily because they intrinsically convert from your hosts specific byte order, so please just use this answer as a starting point to find what you need. Generally code should never make assumptions about what architecture it's on.

Intel == "Little Endian". Network == "Big Endian".

Hope this starts you out on the right track.

answered on Stack Overflow Jul 28, 2011 by Harry Seward
1

Problem converting endianness

c++
xcode
endianness
openal

I've used the following for integral types. On some platforms, it's not safe for non-integral types.

template <typename T> T byte_reverse(T in) {
   T out;
   char* in_c = reinterpret_cast<char *>(&in);
   char* out_c = reinterpret_cast<char *>(&out);
   std::reverse_copy(in_c, in_c+sizeof(T), out_c);
   return out;
};

So, to put that in your file reader (why are you passing the buffer in, since it appears that it could be a temporary)

static unsigned int file_read_int32_le(FILE* file) {
    unsigned int int_buffer;
    size_t bytesRead = fread(&int_buffer, 1, sizeof(int_buffer), file);
    /* Error or less than 4 bytes should be checked */
    return byte_reverse(int_buffer);
}
answered on Stack Overflow Jul 28, 2011 by Dave S • edited Jul 28, 2011 by Dave S
1

Problem converting endianness

c++
xcode
endianness
openal

Yes, *buffer will read in Xcode's debugger as 0x72, because buffer is a pointer to a char.

If the first four bytes in the memory block pointed to by buffer are (hex) 72 00 00 00, then the return value should be 0x00000072, not 0x00000027. The bytes should get swapped, but not the two "nybbles" that make up each byte.

This code leaks the memory you malloc'd, and you don't need to malloc here anyway.

Your byte-swapping is correct on a PowerPC or 68K Mac, but not on an Intel Mac or ARM-based iOS. On those platforms, you don't have to do any byte-swapping because they're natively little-endian.

Core Foundation provides a way to do this all much more easily:

static uint32_t file_read_int32_le(char* buffer, FILE* file) {
    fread(buffer, 1, 4, file);            // Get four bytes from the file
    uint32_t val = *(uint32_t*)buffer;    // Turn them into a 32-bit integer

    // Swap on a big-endian Mac, do nothing on a little-endian Mac or iOS
    return CFSwapInt32LittleToHost(val);
}
answered on Stack Overflow Jul 28, 2011 by Bob Murphy
1

Customizing Fantacy Remote .INI file

remote-desktop
remote-access

In my opinion you should change this:

On server side, set iAcceptInput in [SERVER] section to 0. This might disable mouse and keyboard input.

On client side, in section [MENU] you have to try different values for the key iWindowMode. Try 1, 2 or 3.

answered on Super User May 27, 2010 by user4085
0

Fatal error when starting Tomcat mongrel plugin from inside eclipse

java
eclipse
tomcat
plugins
mongrel

Got this resolved. Putting the answer out here and hope this might help someone.

Basically I had multiple JRE's on my machine and due to a misconfiguration on my side, Tomcat was trying to use files from 2 different JRE's.

To fix it, I went into eclipse Preferences -> Mongrel -> JVM settings. Under the Boot classpath, I put the rt.jar from the jre which tomcat was using to launch.

answered on Stack Overflow Jan 14, 2015 by user2268135
0

'Access violation' using fstream

c++
fstream
visual-c++-2010

In addition to the other answer, there's also another problem your code has.

Streams perform buffered I/O by default; when writing into file1, the contents that you've written probably haven't been outputted to the actual file yet. The contents are actually stored in a temporary buffer for efficiency. Writing to the actual file is an operation reserved for an explicit flush(), when close() is called, or when the file stream goes out of scope and is destructed.

The problem in your code is that directly after writing to the file stream, you perform input without determining whether that output data was written to the actual file. This can cause Undefined Behavior if you assume that the data was read successfully from the input file to the variable.

File streams that depend on each other should be synchronized. Namely, when a file stream is trying to read from the same file that you have written to, then the output file stream must be flushed. This can be facilitated by "tying" the streams together, this is done using tie():

file1.tie(&file2);

When file1 performs input, file2 will then be flushed, forcing the data in its buffer to be written the file.

Another problem you have is that you don't check if the file streams were constructed correctly, or that you have successfully read from file1. You can use if() statements to do this:

std::fstream file1("text.txt", std::ios_base::in  | std::ios_base::binary);
std::fstream file2("text.txt", std::ios_base::out | std::ios_base::binary);
char r('r');

if (file1 && file2)
{
    file1.tie(&file2);

    for (int i = 0; i < 100; ++i)
        file2.write(&r, sizeof(char));

    while (file1.read(&r, sizeof(char))) {
        std::cout << r << std::endl;
    }
}
answered on Stack Overflow May 15, 2014 by 0x499602D2
-1

'Access violation' using fstream

c++
fstream
visual-c++-2010

You started reading from a file immediately after writing on that file and without closing the write file stream. Until you close the write file stream it will not commit the writings. So there is a change of getting access violation as it holds the control.

Try following code

#include <iostream>
#include <fstream>
#include <conio.h>
using namespace std;
int main()
{
char *r="r";

fstream file2("text.txt", ios::out | ios::binary);

for(int i=0; i<100; i++)
    file2.write((char*)r, sizeof(char));
file2.close();

fstream file1("text.txt", ios::in |ios::binary);

while(!file1.eof()) 
{
    char rr;
    file1.read(&rr, sizeof(char));
    cout<<rr<<"\n";
}

file1.close();
getch();
}

You have tried to cast a single char to char * and also tried to read using fread without passing r's address. That's why the problem is occurring. Please carefully see my code above, it will fix your issues.

answered on Stack Overflow May 15, 2014 by MD. Nazmul Kibria • edited May 15, 2014 by MD. Nazmul Kibria

Comments

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Sources

  1. winerror.h from Windows SDK 10.0.14393.0
  2. https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/bug-check-code-reference2
  3. https://msdn.microsoft.com/en-us/library/cc231198.aspx

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