I don't have a specific answer to the opening problems but I did use 
Adobe Acrobat 6 to prepare them.  And, no problem opening them with 
Reader 9 which is the current version.

Dick

ChrisAtUpw@....... wrote:
> In a message dated 2008/09/12, barry_lotz@............. writes:
>
>> I tried to open the pdf manual files but my adobe reader gave me an 
>> error message. Has anyone had a problem with the files?
>> Regards
>> Barry
>
>
> Hi Barry,
>
>        My Acrobat 5 works fine on these files. Maybe you have an older 
> version?
>
>        Regards,
>
>        Chris Chapman 
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