I think the background was, that altough I implemented the application as Add-In instead of an external .exe, it was not able to read ArcMaps license so I had to bind it explicit.
An other thought was that you may not have activated an extension which you are using. I know you're talking about licensing and it's only to create a feature class, but 'was only a thought.
I wonder that you get an exception saying to that there's a licens problem. I remember that in my case I always get the exception that my features are not z-aware. But the problem was the license... huuu?!
'Initialize the application. Dim licenseStatus As esriLicenseStatus = esriLicenseStatus.esriLicenseUnavailable Dim m_AoInitialize As IAoInitialize = New AoInitializeClass() licenseStatus = m_AoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcInfo) licenseStatus = m_AoInitialize.CheckOutExtension(esriLicenseExtensionCode.esriLicenseExtensionCodeSpatialAnalyst)