Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

java.lang.NullPointerException: 	at com.itextpdf.kernel.pdf.tagging.ParentTreeHandler.registerMcr(ParentTreeHandler.java:154)	at com.itextpdf.kernel.pdf.tagging.ParentTreeHandler.registerAllMcrs(ParentTreeHandler.java:246)	at com.itextpdf.kernel.pdf.tagging.ParentTreeHandler.(ParentTreeHandler.java:101)	at com.itextpdf.kernel.pdf.tagging.PdfStructTreeRoot.(PdfStructTreeRoot.java:78)	at com.itextpdf.kernel.pdf.PdfDocument.open(PdfDocument.java:1299)	at com.itextpdf.kernel.pdf.PdfDocument.(PdfDocument.java:199)