Form Definition Error

[Michael]

Working on a form I made some code modifications, closed the form and when I
reopened it I received the following:
-----
The form definition (.xsf) file contains elements, attributes, or structures
that are not valid.

Error details:
The keyref 'ruleSet_4' does not resolve to a key for the Identity Constraint
'{http://schemas.microsoft.com/office/infopath/2003/solutionDefinition}ruleset_name_key'.

Line 484, Position 3
</xsf:xDocumentClass>
--^
-------
The error prevents me from proceeding with opening the form, even in design
mode. It's pretty clear my code error is at line 484 and I expect I could
track it down _if only I could open the form and edit the dang code_.

Please help! How do I edit the .xsn file so I can correct my code? I've
opened in Notepad and Textpad, hoping uselessly I could edit in plain text.
Is there some way I can edit the raw code to get back my form?

Thanks in advance for any help you can provide.

 

[Michael]

Though I looked high and low before posting here I kept searching afterward
and finally found this thread: <http://www.msofficeforums.com/ptopic33.html>.
Solves the problem and clearly explains how to deal with .XSN files.