It looks like you need to use numeric values for Type and Operator in FormatConditions->Add. For example 
$rangeFormat->FormatConditions->Add({Type=>1, Operator=>4, Formula1=>"
+=TRUE"});
$rangeFormat->FormatConditions(1)->Font->{Color} = -16776961;

[download]
makes cells in the first column red except A4 and A9. Here are the codes for Type and Operator.

In reply to Re^3: Win32::OLE Excel Conditional Formatting error by Danny
in thread Win32::OLE Excel Conditional Formatting error by slick.user

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