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file error file handle is null Londonderry, Vermont

Use CancelSynchronousIo to cancel pending synchronous I/O operations. Syntax C++ Copy BOOL WINAPI WriteFile( _In_        HANDLE       hFile, _In_        LPCVOID      lpBuffer, _In_        DWORD        nNumberOfBytesToWrite, _Out_opt_   LPDWORD      lpNumberOfBytesWritten, _Inout_opt_ LPOVERLAPPED lpOverlapped ); Parameters hFile [in] A handle to the file or I/O device (for example, a Note  The GetLastError code ERROR_IO_PENDING is not a failure; it designates the read operation is pending completion asynchronously. For more information about communication time-outs, see COMMTIMEOUTS.

You have explicitly locked or dismounted the volume by using FSCTL_LOCK_VOLUME or FSCTL_DISMOUNT_VOLUME. The lpNumberOfBytesRead parameter should be set to NULL. For the second one, type Control + v and then ENTER. 4. Downloads and tools Windows 10 dev tools Visual Studio Windows SDK Windows Store badges Essentials API reference (Windows apps) API reference (desktop apps) Code samples How-to guides (Windows apps) Learning resources

In this short time, the file cannot be opened with FileShare.None (and in fact, FileShare.Read probably will not help either, since it's quite likely whoever opened it didn't specify FileShare.ReadWrite). Syntax C++ Copy BOOL WINAPI ReadFile( _In_        HANDLE       hFile, _Out_       LPVOID       lpBuffer, _In_        DWORD        nNumberOfBytesToRead, _Out_opt_   LPDWORD      lpNumberOfBytesRead, _Inout_opt_ LPOVERLAPPED lpOverlapped ); Parameters hFile [in] A handle to the device (for example, a file, file stream, So yet again, FileStream is closed just fine, and works well (get rid of the Flush and Close calls, though - they're wasting performance, and useless). Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you!

New tech, old clothes Going to be away for 4 months, should we turn off the refrigerator or leave it on with water inside? Add null byte to name ! Display error message INPUT (0) "" ! This function is designed for both synchronous and asynchronous operations.

Exception routine 1 PRINT (0) "FILE NOT OPENED." ! That's what you should be doing anyway, instead of relying on the path being happy - most readers only allow concurrent reads, not writes. For the first ^M you need to hold down the Control key while typing vm. Learn More.

For more information see   Considerations for working with asynchronous file handles: ReadFile may return before the read operation is complete. For additional information, see SetProcessWorkingSetSize. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. LENGTH 2 & LOCAL AX$,BX$,CX$,DX$ !

Log in Project Etal Home Forums > Project D2Etal > Help Archive > Solved Archive > This site uses cookies. C++ Copy #include #define ROUND_UP_SIZE(Value,Pow2) ((SIZE_T) ((((ULONG)(Value)) + (Pow2) - 1) & (~(((LONG)(Pow2)) - 1)))) #define ROUND_UP_PTR(Ptr,Pow2) ((void *) ((((ULONG_PTR)(Ptr)) + (Pow2) - 1) & (~(((LONG_PTR)(Pow2)) - 1)))) void main() Sometimes your file will be too large to open in vi. nNumberOfBytesToWrite [in] The number of bytes to be written to the file or device.

The ReadFile function may fail with ERROR_NOT_ENOUGH_QUOTA, which means the calling process's buffer could not be page-locked. The MPI-2 extensions, Volume 2No preview available - 2003MPI: the complete reference. In this scenario, WriteFile returns FALSE and the GetLastError function returns ERROR_IO_PENDING, which allows the calling process to continue while the system completes the write operation. Hold CLOSE (1) !

uconv is much better for working with large files. more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation As I have closed the file handle in CloseHandle() function, but I get the error "file is in use with some other process" in DoSomeOperation(). Initialize variables PRINT (0,100) !

Return value If the function succeeds, the return value is nonzero (TRUE). If part of a file is locked by another process and the read operation overlaps the locked portion, this function fails. How should I interpret "English is poor" review when I used a language check service before submission? I had "unlock locked file handles" and "delete file" checked.I got this error:"An error occurred in the function delete fileFind remote file handles returned null valueThis may affect deletion of the

Because the read operation starts at the offset that is specified in the OVERLAPPED structure, and ReadFile may return before the system-level read operation is complete (read pending), neither the offset For more information about different combinations of lpOverlapped and FILE_FLAG_OVERLAPPED, see the Remarks section and the Synchronization and File Position section. Your name or email address: Password: Forgot your password? Thanks Frank CWin Vista Ultimate 64 bit SP2 Share this post Link to post Share on other sites Firefox    Forum Deity Trusted Advisors 14,914 posts Location: USA ID: 2  

I/O operations that are canceled complete with the error ERROR_OPERATION_ABORTED. The caller must not use this buffer until the read operation is completed. As always, you guys are the best Always friendly and helpful! Use app-get or another UNIX package manager to get uconv if you don’t have it.

Long answer: Opening a file can fail for several reasons, including missing files or insufficient privileges. If the hFile parameter is associated with an I/O completion port, you can also get the number of bytes written by calling the GetQueuedCompletionStatus function. If a named pipe is being read in message mode and the next message is longer than the nNumberOfBytesToRead parameter specifies, ReadFile returns FALSE and GetLastError returns ERROR_MORE_DATA. The following C++ example shows how to align sectors for unbuffered file writes.

Why are so many metros underground? Karlsen May 28 '15 at 9:59 1 Well, the thing about WCF is that for every client call a new service instance is created usually. Perform DOSFC call ! Use NULL for this parameter if this is an asynchronous operation to avoid potentially erroneous results.

Opening and closing file handle multiple time decrease performance so I am following this approach. Reads occur at the position specified by the file pointer if supported by the device. If you write directly to a volume that has a mounted file system, you must first obtain exclusive access to the volume. Postgres will not let you specify a NULL value as an empty string (,,).

Open error file DOSCODE$ = "D" + HEXASC(SUB(AX$,2,1)) ! Display message OPEN (1) "QERCOMET" ! The behavior of a null write operation depends on the underlying file system or communications technology. Once all data is written, I call CloseHandle().

Share this post Link to post Share on other sites AdvancedSetup    Staff Root Admin 62,915 posts Location: US ID: 5   Posted October 13, 2010 I don't think that is For asynchronous write operations, hFile can be any handle opened with the CreateFile function using the FILE_FLAG_OVERLAPPED flag or a socket handle returned by the socket or accept function. If lpOverlapped is not NULL, the read operation starts at the offset that is specified in the OVERLAPPED structure and ReadFile does not return until the read operation is complete. Perform DOSMS call !

if I put a thread.sleep(1000) just before this statement then all works fine. } I have written a small test code to reproduce the same scenario on console application: Just Call All Activity Home Malwarebytes Anti-Malware Support Malwarebytes Anti-Malware FileAssassin help request Privacy Policy Contact Us Back to Top Malwarebytes Community Software by Invision Power Services, Inc. × Existing user? Define DOS error code LENGTH 37 & LOCAL DOSMESSAGE$ !