CT_Text.Write throws null exception

[luoyigit]

doc.Write(outFile);
{System.NullReferenceException: Object reference not set to an instance of an object.
at NPOI.OpenXml4Net.Util.XmlHelper.EncodeXml(String xml)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Text.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_R.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_P.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Tc.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Row.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Tbl.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Body.Write(StreamWriter sw, String nodeName)
at NPOI.OpenXmlFormats.Wordprocessing.CT_Document.Write(StreamWriter sw)
at NPOI.OpenXmlFormats.Wordprocessing.DocumentDocument.Save(Stream stream)
at NPOI.XWPF.UserModel.XWPFDocument.Commit()
at NPOI.POIXMLDocumentPart.OnSave(List`1 alreadySaved)
at NPOI.POIXMLDocument.Write(Stream stream)

[FedePorti]

I have the same problem. Could you solve it?
My code was working good, but I added a table at the beginning in the word template and now I get this error.

[tonyqus]

Please upload your word template to help reproduce the issue

[FedePorti]

Original Good.docx
Modify 1.docx
Modify 2.docx
Here are the files, the original (that worked well) and the others with the modification (I insert a table and I change the header).

And here is how I save it:

Dim out As New FileStream(FileNameSaved, FileMode.Create, FileAccess.Write)
doc.Write(out)
out.Close()
doc.Close()

[FedePorti]

ModWordPOI.txt

And this are the functions that I create to write in a word document (most of them to write in tables), maybe this can help other people

[FedePorti]

@tonyqus, I found the error. In my function WriteCell the text was nothing, so when I call SetText(text) did not through an exception but yes when I try to save it, so that was the problem.

I update my function in the document attached.
ModWordPOI.txt