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QUESTION
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When synchronizing in Microsoft Access, I get the following error:
ERROR: -2147467259 – File sharing lock count exceeded. Increase MaxLocksPerFile registry Entry.

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ANSWER
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Adjust the registry entry MaxLocksPerFile to increase the maximum number – see:http://support.microsoft.com/kb/815281 (Method 1)
Start button, Run
Type: RegEdit
Click OK
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For Access 2000, Access 2002, Access 2003 running on Windows 32 bit (x86)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Jet\4.0\Engines\Jet 4.0
For Access 2000, Access 2002, Access 2003 running on Windows 64 bit (x64)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Jet\4.0\Engines\Jet 4.0
For Access 2007 running on Windows 32 bit (x86)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Access Connectivity Engine\Engines\ACE
For Access 2007 running on Windows 64 bit (x64)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\12.0\Access Connectivity Engine\Engines\ACE
For Access 2010 running on Windows 32 bit (x86)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Access Connectivity Engine\Engines\ACE
For Access 2010 running on Windows 64 bit (x64)
Locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\14.0\Access Connectivity Engine\Engines\ACE
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In the right hand pane, double-click the MaxLocksPerFile item.
In the Edit DWORD Value window, select Decimal
Modify the number in the Value text field as required (perhaps up it by 4x?)
Click OK
Reboot

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Or temporarily change the entry on a per database file basis by using SetOption in your VBA code – see:http://support.microsoft.com/kb/815281 (Method 2)

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EXAMPLES
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APPLIES TO / KEY WORDS
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Microsoft Access
Error
Sync