Take a look he

http://support.microsoft.com/default...;EN-US;q307410
OFF: "Compile Error in Hidden Module" Error Message When You Start
Word or Excel

It points at PDFMaker.xla as being the culprit.

sweetan wrote:

Using WindowsXP on MSOffice2003.
When opening and closing Microsoft Excel an error message displayed as :
Compile error in hidden module: autoexecnew
DistMon
It does not affet my worksheets but it's a bit irritating to receive this
type of message all the time.
Appreciate if some one can guide me or give me an instruction on how to
clear this type of message.
Thanks you very much.
Regards,
SweeTan

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Dave Peterson