Submit Button error - Data Connection failing

Question

I am the form designer and am currently testing a new form I have created, however there is an error with my submit button which Saves the form to SharePoint, I receive the following error message:
InfoPath cannot submit the form.
An error occurred while the form was being submitted.
The form cannot be submitted to the following location: http://servername/siteA/siteB/siteC/FormLibrary/FormName.xml
The file: http://servername/siteA/siteB/siteC/FormLibrary/FormName.xml" is checked out for editing by DOMAIN\MyUserName.
The operation completed successfully.
The form is not checked out to me, or open by anybody else, also check out functionality is not forced on this SharePoint library.
On searching forums I have read about using friendly server names and I am using the server's name in the URL, i.e.
http://servername instead of the alias
http://intranet - this had solved the problem in other forms, but not this one.
Looking closely at the rules on my submit button, the following actions occur:
1st rule checks the selection of certain fields, if the conditions are right it will set the values of 3 different fields.
The 2nd rule saves to SharePoint using a data connection (please note this data connection works fine on different submit buttons in different views). The second rule also closes the form.
To test where the error occurs I added a series of actions to display messages, and the problem is definitely on the data connection rule.
The data connection is to save to a Sharepoint library, using a field called "filename" as the file name. The data connection allows overwrites. The file name is set the first time a file is saved (it has a condition which checks a field which
gets set upon any save event - if this field is set to 0 filename gets set and this field gets set to 1 - because this field is now equal to 1, the filename field will nwever get set again).
I have 2 views on the form, one named phase 1, the other named phase 2. When the custom submit button is pressed on the phase 1 view, my data connection works, but on the save 2 view, the exact same data connection fails with the error message above.
I am using Windows 7, InfoPath 2010, SharePoint 2010, InfoPath filler form).
In Windows XP, for a different user, the error messaeg is a little different, and the form does actually save:
InfoPath cannot submit the form
An error occurred while the form was being submitted
The form cannot be submitted to the following location: http://servername/siteA/siteB/siteC/FormLibrary/FormName.xml
The file is in use by another application or user.
As I said the form does actually save its changes but still throws up this error message which will be very confusing to end users.
I've exhausted all avenues that I know of to find the cause of the error messages and I'm at a loss, please help!
Thanks,
Ben

Answer 1

bgvball14. I found that the error was down to the friendly name / server name issue. I have made sure that everything uses the friendly name e.g.
http://intranet instead of the servername e.g.
http://servername. I made sure the data connection and all options in the publishing wizard are set to the friendly name. There were still some forms that didn't work though - this was because when trying to fix this problem I had switched several times
between using the friendly /server names and some forms were looking for the template with the server name (these didn't work), other forms looked for the friendly name (these did work).
What I did was open my form library in windows explorer view and then drag each form into Notepad so I could see the source code. On the top two lines I could see the reference to the template and in some cases the template weas referenced using the server
aname, which I changed to the friendly name and this worked. I did have to check every form in the library. Basically, everything should reference the friendly name (e.g.
http://intranet.
Ben