Help! I always have this erro message whenever i want to view my report ftom java gui "net.sf.jasperreports.engine.jrexception error executing sql statement for null". I can preview the report without any problem, just whenever i try to click a button form the java gui, the same error message always pop up. Is there any problem with my SQL? Where is the null? I'm really frustrated because of this. SELECT brgkeluar_kmf.`tanggal` AS brgkeluar_kmf_tanggal, brgkeluar_kmf.`kode` AS brgkeluar_kmf_kode, brgkeluar_kmf.`nama` AS brgkeluar_kmf_nama, brgkeluar_kmf.`satuan` AS brgkeluar_kmf_satuan, brgkeluar_kmf.`kategori` AS brgkeluar_kmf_kategori, brgkeluar_kmf.`departemen` AS brgkeluar_kmf_departemen, brgkeluar_kmf.`blok` AS brgkeluar_kmf_blok, brgkeluar_kmf.`estate` AS brgkeluar_kmf_estate, brgkeluar_kmf.`jumlah` AS brgkeluar_kmf_jumlah, brgkeluar_kmf.`harga` AS brgkeluar_kmf_hargaFROM `brgkeluar_kmf` brgkeluar_kmfWHERE tanggal BETWEEN $P{nomorAwal} AND $P{nomorAkhir}[/code]