Validate PDF/A error

Hi, i try to validate the file in attachment using aspose-pdf-4.3.0.jar, but i get the following exception:
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 1
    at java.lang.String.charAt(String.java:686)
    at com.aspose.pdf.a.b.e.b.a.a.a(Unknown Source)
    at com.aspose.pdf.a.i.a.b.a(Unknown Source)
    at com.aspose.pdf.a.i.a.b.i(Unknown Source)
    at com.aspose.pdf.a.i.a.b.a(Unknown Source)
    at com.aspose.pdf.a.d.a(Unknown Source)
    at com.aspose.pdf.ADocument.validate(Unknown Source)
    at com.aspose.pdf.Document.validate(Unknown Source)

In Attachment there is a test class.

Thanks in advance,

Marco