Maximum Excel Sheet Name Length?

SQL Server 2008 R2, VS 2008, XL 2003

I think I know the answer to this based on testing but I was wondering if anyone can confirm if there is a maximum excel sheet name length when loading from MS Excel worksheets?

As an example, I have a package that dynamically creates a variable which forms something like the following:

SELECT * FROM [Cybil Extract CapAd - Singapore$A2:AL]

that fails even though the worksheet name is correct

If I change the worksheet name to Cybil Extract CapAd- Singapore (i.e. remove 1 space), it works fine. Doesn;t matter which character I change / add - the linit seems to be 30 characters...