After you install Microsoft Office 2003 Service Pack 3 (SP3), you cannot open Microsoft Excel 5.0/95 Workbook
files that contain Microsoft Visual Basic for Applications (VBA) macros in Microsoft Office Excel 2003
If the macro security level is set to High
or to Very High
, you may receive the following error message:
This workbook cannot be opened under High Security Level because it contains a type of macro (Microsoft Excel 4.0 macro) that cannot be disabled or signed.
If the macro security level is set to Medium
, you may unexpectedly be prompted to enable the macros or to disable the macros.