If you are seeing a Windows error while reading access violation, the following user guide will help you.
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A read or write access violation occurs when an application attempts to read or write memory from an invalid memory target. To be valid, a given memory page must be of a valid level, protection, and type. In particular, the memory must be in the MEM_COMMIT state. The memory may not necessarily be of any type; MEM_IMAGE, MEM_MAPPED or MEM_PRIVATE.
Check your computer for malware.Add an exception for predata execution prevention.Disable User Account Control.create options.Make sure the archive is not read-only.Reconnect your headphones.Check for hardware problems.Use compatibility mode.
You’re not calling the full function signature, which I think leads to access violations (due to arbitrary writes to memory) and errors. Full signature functionality (fully verified here):
BOOL WINAPI GetDiskFreeSpaceEx( _In_opt_LPCTSTR lpDirectoryName, _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable, _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes, _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes);def disk_space(disk): free space = ctypes.c_ulonglong() includes calcspace ctypes.windll.kernel32.GetDiskFreeSpaceExA err means calcspace(disk, ctypes.byref (free space), nothing, nothing)assert err != 0, 'Calcspace error' disk_size = free space.value return disk_sizeASR Pro is the ultimate solution for your PC repair needs! Not only does it swiftly and safely diagnose and repair various Windows issues, but it also increases system performance, optimizes memory, improves security and fine tunes your PC for maximum reliability. So why wait? Get started today!
answered in February 2015 at 14:45
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<p><h2 id="2"><span class="ez-toc-section" id="What_is_access_violation_error"></span>What is access violation error?<span class="ez-toc-section-end"></span></h2>
<p>An access violation is often an unhandled error. The error means that several codes tried to act on callbacks that it doesn’t have permission to, that they can’t assign or expose. “Unhandled” means that the error occurred in a completely new state that the authors of the code created rather than expected or thought likely.</p>
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<p>A read or possibly write violation occurs when users attempt to read or write memory from an invalid memory address. For a memory page to be valid, it must have a valid <a>state</a> and <a>protection type</a>. The memory </p>
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<p><h2 id="3"><span class="ez-toc-section" id="What_causes_access_violation_errors_C"></span>What causes access violation errors C++?<span class="ez-toc-section-end"></span></h2>
<p>Memory access violations are most often caused by such errors in programs in the form of array overflows or null pointer usage. Let’s look at a bug in a C++ program that can cause these types of errors.</p>
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<p>must be in the MEM_COMMIT state.</p>
<p>Good old RAM can be type; any MEM_IMAGE, MEM_MAPPED, or MEM_PRIVATE.</p>
<p>For read operations, the memory-related protection must be PAGE_READONLY, PAGE_READWRITE, PAGE_WRITECOPY, PAGE_EXECUTE_READWRITE page_execute_read, or PAGE_EXECUTE_WRITECOPY.</p>
<p>For write operations, currently memory protection time should be PAGE_READWRITE, PAGE_WRITECOPY, PAGE_EXECUTE_READWRITE and and PAGE_EXECUTE_WRITECOPY.</p>
<p>To display your own <a>status</a>, <a>security</a> and <a >type</a> addresses, get !address </p>
<address>
<ul>
<li>Be sure to reference existing values; unallocated values</li>
<li>Each region of the memory descriptor page (4 KB minimum) keeps track of both the pre-allocation protection value and the last protection value set by that particular <a>VirtualProtect</a> family of functions. </li>
</ul>
<p>A memory address may be invalid due to one of the following simple scenarios:</p>
<ul>
<li>NULL pointers – addresses 0x0 between and , 0x10000 (64K) – for example, a function that normally returns a pointer that returns NULL (0x0) and the pointer was accessed for verification. </li>
<li>Use-After-Free – The address is still valid, but will now be available after it is freed (data)</li>
<li>Bit-Flip – RAM (hardware) – release one or need flip more bits (rare)</li>
</ul>
<p>Additional Resources:</p>
<ul>
<li><a>Access Violation Inside</a >< /li>< li> < a>Inside – Access Violation C0000005 – Run</a></li>
<li><a>Inside is Windows SDK</a> </li>
<li><a>MSDN – Memory Protection Constants</a ></li>
<li><a>MSDN – StruMEMORY_BASIC_INFORMATION</a></li>
</ul>
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<p>A read or write violation occurs when an application attempts to read or write memory from a currently invalid memory address. To be valid, the callback page must have a valid <a>state</a> and <a>security type</a>. The memory </p>
<p>must be in our MEM_COMMIT state.</p>
<p>The memory can be of type; any MEM_IMAGE, MEM_MAPPED, or MEM_PRIVATE.</p>
<p>For read methods, the memory protection must be PAGE_READONLY, PAGE_READWRITE, PAGE_WRITECOPY, PAGE_EXECUTE_READWRITE, page_execute_read, or PAGE_EXECUTE_WRITECOPY.</p>
<p>For write operations, the protection must be PAGE_READWRITE , PAGE_WRITECOPY.</p>
<p>For write operations, the protection must be PAGE_READWRITE , PAGE_WRITECOPY PAGE_EXECUTE_READWRITE or PAGE_EXECUTE_WRITECOPY memory hold.</p>
<p>To display <a>status</a>, <a>security</a> and <a> type</a> use !address for </p>
<address>< /p></p>
<ul>
<li>Be sure to reference the current values; not salary values</li>
<li>Each region of memory page 4K) (at least mp3 both the initial protection value when allocated and the current protection value, as a group by < a>
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