Customer updated- y7 Error

 Hello,

We are trying to update the customer address but the customer interface is rejecting the record with erro 'y7'.

As per metalink the 

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Enable the Check Box Allow Changes to Printed Transactions in System options.
Navigation path
set up --> System -->System options --> Trans and Customers Tab -->
Allow Changes to Printed Transactions check box
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I checked the setup but the  Allow Changes to Printed Transactions check box is already checked.

Can someone please help.

Regards,

Mukund