https://issues.apache.org/bugzilla/show_bug.cgi?id=53255
--- Comment #2 from sweeny...@gmail.com --- I am facing the same issue, also there is no code in the setRowGroupCollapsed method in SXSSF: method from SXSSFSheet.class: public void setRowGroupCollapsed(int row, boolean collapse) { //_sh.setRowGroupCollapsed(row, collapse); throw new RuntimeException("Not Implemented"); } How does collapsing work otherwise in SXSSF Sheets? -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org