PRB: "Failure Writing to the System Registry" Error Message

• Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 32-bit only, for Windows, version 5.0
• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 6.0

SYMPTOMS

When you run a setup program that was created using the Application Setup Wizard, you receive the following error message:

Failure writing to the system registry. The registry may be corrupt, or
you may not have the required permissions to write to the registry.

CAUSE

As the error message indicates, the problem may be due to a corrupt registry or incorrect permissions to write to the registry. In addition, the problem occurs on computers running Windows 95 when the Setup program tries to add an entry to a registry key and the key will exceed 64K in size as a result. Registry keys are limited to 64K in Windows 95.

RESOLUTION

When the problem occurs on a Windows 95 computer, it usually happens when Setup tries to add entries to the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs 

1. Click the Start button, and then click Run.



2. In the Open box, type "regedit" (without the quotation marks), and then click OK.



3. On the Edit menu, click Find. In the Find What box, type "SharedDLLs" (without the quotation marks). Under Look At, select only the Keys check box, and then click Find Next.



4. On the Registry menu, click Export Registry File. In the Save In list, click Desktop. In the File Name box, type "MySharedDLLs" (without the quotation marks), and then click Save.
   
   This saves a copy of the SharedDLLs registry key to a file called MySharedDLLs.reg on the Desktop.



5. On the Desktop, right-click MySharedDLLs.reg, and then click Properties on the shortcut menu. Note the size of the file. If it is approximately 64K in size, the "Failure writing to the system registry" error message is being caused by a limitation of Windows 95.
   
   To work around the 64K limit, open the MySharedDLLs.reg file you created in step 4 in Notepad or Wordpad. Notice which programs have entries in the SharedDLLs key. If you notice file names from programs that you are no longer using, you may want to remove (uninstall) these programs to free up space in the registry key. If you have entries for files that no longer exist on the hard drive, you can remove the entries directly.

• In NT, try running Setup while logged on the computer as a member of the Administrators group to determine whether there is a problem with permissions.



• Run the RegClean utility.
  
  RegClean is designed to clean up unnecessary entries in the HKEY_CLASSES_ROOT branch of the registry. For more information about RegClean, please see the following article in the Microsoft Knowledge Base:
  
  Q147769 INFO: RegClean 4.1a Description and General Issues

• Restore the registry file from a backup. For additional information, please see the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

Q217165 FILE: ShareDLL.exe File Checks the Size of the SharedDLLs Regist

Additional query words: capacity limitation

Keywords : kbsetup kbDSSTools kbVBp500 kbVBp600 kbGrpVB kbDSupport
Version : WINDOWS:5.0,6.0
Platform : WINDOWS
Issue type : kbprb