InfoPath Dev

Hi all, You quick help will be really appreciated. There is one Form Library on SharePoint Team Site having a InfoPath 2010 form. I have also created 2 custom SP workflows which triggers when new form is added to it. Till yesterday all was working well with the forms, but suddenly we came across a strange issue. While opening the form it says Error Description: InfoPath can not open the following file...http://.....................//abc.xml There was an error in custom validation code. The data in this control has been digitally signed and cannot be changed. The forms are digitally signed by Manager and Human Resource person. When we try to open these forms for printing, we are not able to open the form and getting below error message. Can anyone help me to resolve this error. Thanks Madhura

 My guess would be that there is something changing in the XML when you try to open it that wasn't changing before but I have no idea what that may be. Do you have an option to remove the signature so the form will open? If so, I'd do that, and save the XML locally as a copy. Then I'd compare it to the still signed version and look for differences. Here's a blog post I wrote up on a situation where a default value was behaving differently in filler and browser, in case that's of any help: http://www.infopathdev.com/blogs/hilary/archive/2011/01/28/what-a-difference-a-decimal-place-makes.aspx