Getting exception in msg splitting

Hi,

I am trying to split msg mail, getting following error

java.lang.IllegalArgumentException: length

            at com.aspose.email.ms.System.IO.f.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.a(Unknown Source)

            at com.aspose.email.co.<init>(Unknown Source)

            at com.aspose.email.MapiMessageReader.<init>(Unknown Source)

            at com.aspose.email.MapiMessage.a(Unknown Source)

            at com.aspose.email.MapiMessage.fromStream(Unknown Source)

Sorry, due to proprietary reason, can not share the email.

Please let me know, what can cause this error.