Created attachment 32913 [details] Error excel file [Content Types].xml Root element <Types> no default namespace, MUST be: <Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"> *.rels file Root Element <Relationships> no default namespace, MUST be: <Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships">
Do you have some sample code which you use to create this file?
We cannot look at this without some sample code that reproduces this, please reopen this bug as soon as you have attached the necessary sample code (self-sufficient producing a broken document, ideally as unit-test)