I get the error below when extracting messages from a PST file that contains over 2000 messages. With less a folder containing less than 100, it works fine.
System.NullReferenceException: Object reference not set to an instance of an object.
at Aspose.Network.Outlook.Pst.x55850985d9b257fa.x3cb7ff236de485eb(x6e378315d7f18d9f x4d880c03450811f5)
at Aspose.Network.Outlook.Pst.x05cbc1bac105d46a.x082b35eb7b70afaa(UInt32 x4795706044b92bc2, x3076b467d0e983c6 xfeb2e9e59f723093)
at Aspose.Network.Outlook.Pst.x05cbc1bac105d46a.xe4e8e9b08fe144e9(UInt32 x4795706044b92bc2)
at Aspose.Network.Outlook.Pst.x011b317f942bde1a.x5b039f60be8fb267(UInt32 xbabf3811148a81e8, MapiMessage x8a41fbc87a3fb305)
at Aspose.Network.Outlook.Pst.x011b317f942bde1a.x05a1d65648a9b06a(UInt32 x4e2174b6f6d91cbd)
at Aspose.Network.Outlook.Pst.PersonalStorage.ExtractMessage(MessageInfo messageInfo)