Error about XSF and now can't open file

[CycleFitness]

I was designing a form and am now getting this error and can't open the file
in Design mode:

The form definition (.xsf) file contains elements, attributes, or structures
that are not valid.

Error details:
The keyref 'ruleSet_9' does not resolve to a key for the Identity Constraint
'{http://schemas.microsoft.com/office/infopath/2003/solutionDefinition}ruleset_name_key'.

Line 232, Position 3
</xsf:xDocumentClass>
--^

What can I do to recover from this? Thanks!

 

[Phil Parker]

Hi,

You'll need to make a back up of the xsn file first before continuing the
remaining steps. After that rename the xsn extension to cab. Then extract
all of the files to a new directory you have created. Open the manifest file
in a text editor and go to the line in question. Many times all that is
needed is to remove the offending line and then open the manifest file in
design mode (which will load it back into InfoPath).

Hope that helps...