Access displays this message when it runs in sandbox mode but Jet 4.0 SP 8 or later is not installed on your computer.

What is sandbox mode?

Simply put, sandbox mode is a security feature. In sandbox mode, Access evaluates only those expressions in control and field properties that are safe, and do not contain malicious code. An expression is considered safe if it does not use functions or properties that could damage your data in any way. For example, functions such as Kill and Shell could be used to damage data and files on a computer, so they are not considered safe. When Access runs in sandbox mode, an expression that calls these functions will result in an error message.

For more information on sandbox mode, see the Help topic About Microsoft Jet Expression Service sandbox mode.

Why do I need to install Jet 4.0 SP 8 or later?

In sandbox mode, several Access features, including wizards, are disabled. To enable these features while continuing to run Access in sandbox mode, you need to install Jet 4.0 SP 8 or later.

• Wizards may not start.
• Switchboards created by using the Switchboard Manager won't function properly.
• You can't use the RunCode macro action to call a Visual Basic for Applications (VBA) procedure.
• Event handlers that call VBA procedures won't function.
• VBA procedures that are called from a property sheet or used in an SQL statement won't function.
• The following VBA functions won't work when called from a property sheet or used in an SQL statement:
  • FormatCurrency
  • FormatDateTime
  • FormatNumber
  • FormatPercent
  • InStrB
  • InStrRev
  • MonthName
  • Replace
  • StrReverse
  • WeekDayName

For more information about installing the Jet upgrade, see About Microsoft Jet 4.0 SP8 or later.

When you start Access after installing the Jet upgrade, Access will prompt you once to enable sandbox mode. Click Yes, and restart Access.