Synchronization problems xp "parameter is incorrect"

To troubleshoot the offline files cache: If the offline files cache on a user's computer becomes corrupted, the user typically sees the following error message whenever he attemp ts to synchronize an offline file with the server copy: "Unable to merge offline changes on\\server_name\share_name. The parameter is incorrect." The offline files cache is stored in the %SystemRoot%\CSC folder, and it's possible to corrupt the cache if the user modifies the files (or the folder i ts elf) directly. In this scenario, your best bet is to delete the files in the cache by using the Offline Files viewer and then attempt to resynchronize the files. To delete the files, open Windows Explorer and choose Tools Folder Options. Select the Offline Files tab and then click View Files. You now see a list of all offline files stored on the user's computer. Delete the copies of the files stored in this folder. Next, attempt to synchronize the files by choosing Tools Synchronize, and then click Synchronize. If after completing the synchronization the user is still experiencing errors, you can reset the offline files cache in Windows Explorer by choosing Tools Folder Options. Select the Offline Files tab. Press [Ctrl][Shift], and then click Delete Files. Windows 2000 will now reinitialize the offline files cache on the user's computer. Click Yes to continue. When the process is complete click Yes again to restart the computer. The user should now be able to access and synchronize offline files with your server.


SUMMARY
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The Offline Files (CSC or Client Side Caching) cache and database has a built-in capability to restart if its contents are suspected of being corrupted. If corruption is suspected, the Synchronization Wizard may return the following error message:
Unable to merge offline changes on \\server_name\share_name. The parameter is incorrect.
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MORE INFORMATION
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Method 1
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The Offline Files cache is a folder structure located in the %SystemRoot%\CSC folder, which is hidden by default. The CSC folder, and any files and subfolders it contains, should not be modified directly; doing so can result in data loss and a complete breakdown of Offline Files functionality.If you suspect corruption in the database, then the files should be deleted using the Offline Files viewer. After the files are deleted out of the Offline Files viewer, a synchronization of files may then be forced using Synchronization Manager. If the cache still does not appear to function correctly, an Offline Files reset can be performed using the following procedure:
1.
In Folder Options, on the Offline Files tab, press CTRL+SHIFT, and then click Delete Files. The following message appears:
The Offline Files cache on the local computer will be re-initialized. Any changes that have not been synchronized with computers on the network will be lost. Any files or folders made available offline will no longer be available offline. A computer restart is required.Do you wish to re-initialize the cache?
2.
Click Yes two times to restart the computer.
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Method 2
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If you cannot access the Offline Files tab, use this method to reinitialize the Offline Files (CSC) cache on the system by modifying the registry. Use this method also to reinitialize the offline files database/client-side cache on multiple systems. Add the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\NetCache Key Name: FormatDatabase Key Type: DWORD Key Value: 1Note The actual value of the registry key is ignored. This registry change requires a restart. When the computer is restarting, the shell will reinitialize the CSC cache and then delete the registry key if the registry entry exists. Warning All cache files are deleted and unsynchronized data is lost.
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REFERENCES
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For more information, click the following article number to view the article in the Microsoft Knowledge Base:
230739 (http://support.microsoft.com/kb/230739/) Structure of the Offline Files cache folder
328284 (http://support.microsoft.com/kb/328284/) Some files and folders that are not configured to be made available offline are cached
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