InfoPath 2010 browser-enabled forms cannot be opened – "The following document is not a valid InfoPath form"

SharePoint 2010, InfoPath 2010 browser-enabled forms
Issue description:
We have alot of InfoPath forms in SharePoint 2010.  These forms were migrated from InfoPath 2003 client to InfoPath 2010 browser-enabled. Occasionally a few InfoPath forms cannot be opened in browser with the following error:
There has been an error while loading the form.
The following document is not a valid InfoPath form: {path of form}
After doing some research and comparision, I noticed that we have a rich text field in the form that users use to copy and past html content from the internet. The pasted content includes the following string that caused this issue:
<?XML:NAMESPACE PREFIX = "[default]" http:="http:"  xmlns:http="urn:http"  ?>
  • Download the form to local machine. Open the form in notepad. Find the above string and delete.
  • From SharePoint library, find the affected item.
  • Checkout the item (if checkout is required)
  • Upload a file to the library, point the path to the local path of the newly saved xml file.
  • Save
  • Open the form from SharePoint, it should open in browser without any issue.
Comments (1)

  1. Wayne says:

    Infopath is very hard to work with!

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