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

via poi-user by Scott Callaghan, 1 year ago
via poi-user by Scott Callaghan, 1 year ago
via poi-user by Scott Callaghan, 1 year ago
via poi-user by Nick Burch, 1 year ago
via poi-user by Scott Callaghan, 1 year ago
via poi-user by Scott Callaghan, 1 year ago
java.lang.NullPointerException at org.apache.poi.util.PackageHelper.copy(PackageHelper.java:129) at org.apache.poi.util.PackageHelper.clone(PackageHelper.java:87) at org.apache.poi.util.PackageHelper.clone(PackageHelper.java:44) at org.apache.poi.POIXMLDocument.ensureWriteAccess(POIXMLDocument.java:185) at org.apache.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:169) at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:63)