Error 53: Unable to Load DLL ‘verywrite.dll’ in .NET Application – Fix Invalid Access to Memory Location in 32-bit Windows Vista, 10, 11 systems

Posted on Author VeryPDF / 95 Views

Question:

Hi,

We are testing the latest development version of our application, which is being ported to .NET. One of our testing environments (using Vista 32-bit) shows a problem when we make calls to the verywrite.dll. The error occurs at the execution of this line: 

' create new PDF output files.
glPDF_ID = VeryCreate(mszReportFile)

The full text of the error message is: 

Error 53: Unable to load DLL 'verywrite.dll': Invalid access to memory location. (Exception from HRESULT: 0x800703E6)

The way we have our application configured, the VeryWrite.DLL is only in the %SYSTEMROOT%\System32 folder, and the imgDLL.dll and cviDLL.dll are in the same directory as our application.

Can you advise me on how we can get past this error 53?

Thanks.

https://www.verypdf.com/app/pdf-editor-toolkit/index.html

PDF Editor Toolkit SDK

Answer:

Thank you for reaching out! The issue you're encountering, "Error 53: Unable to load DLL 'verywrite.dll': Invalid access to memory location," is commonly related to how dynamic link libraries (DLLs) are loaded in Windows environments.

The error can occur when the application cannot find the DLL or if there are permission issues when accessing the DLL. Based on your situation, there are a few potential causes and solutions to consider:

Solution 1: Ensure the DLLs Are in the Correct Location

When using DLLs in a .NET application, it's important to make sure that the dependent DLLs, such as verywrite.dll, are either in the same directory as the executable (EXE) file or in a system folder like %SYSTEMROOT%\System32. While you mentioned that verywrite.dll is placed in the %SYSTEMROOT%\System32 folder, it’s often a good practice to place all related DLLs in the same directory as the executable. This helps avoid conflicts that can arise due to system-specific configurations.

Steps to resolve:
  1. Compile your source code into an EXE file.

  2. Copy the EXE file along with the verywrite.dll, imgDLL.dll, and cviDLL.dll into the same folder.
  3. Run the EXE from this folder.

By ensuring that all DLLs are located in the same directory as your application, the application will have access to all the necessary components at runtime.

Solution 2: Check System Permissions

Another possible cause of this error could be insufficient permissions when accessing the verywrite.dll file in the %SYSTEMROOT%\System32 folder. Windows Vista (and other versions) have specific security measures that may prevent DLLs from being loaded correctly.

To address this:

  • Ensure that the account running the application has read and execute permissions for verywrite.dll.

  • If you're working in a controlled environment (such as a company network), verify that no security policies are restricting access to the DLLs.
Solution 3: Confirm Compatibility of the DLLs with Your System

Since you're working in a Vista 32-bit environment, it’s important to ensure that verywrite.dll and other associated DLLs are compatible with the 32-bit architecture. If you're using 64-bit versions of the DLLs or mismatched versions of the libraries, it can lead to loading errors like the one you’re experiencing.

Verify that all the DLLs are built for the correct architecture (32-bit in your case).

Solution 4: Check for Memory Access Issues

The specific error message, "Invalid access to memory location," suggests that there could be issues with how memory is being accessed during the DLL call. This can sometimes occur due to a misconfiguration in how the DLLs are loaded or if there’s an issue with the system's memory.

  • Make sure that the version of the verywrite.dll you’re using is the latest and properly compiled for your system.

  • If you have access to debugging tools, consider running your application with a debugger to see where the issue might be originating.
Conclusion:

The simplest solution is to follow the steps provided in Solution 1, which should resolve the issue in most cases. After compiling your EXE, place it alongside the necessary DLLs in the same directory, then run it again. This will ensure that your application can load the DLL correctly.

If the issue persists, make sure to check the system permissions and confirm that your DLLs are compatible with your Vista 32-bit system.

For further assistance or troubleshooting, feel free to reach out.

Best regards,
VeryPDF Team

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