Gurus, Please help. I've a java based e-speak adapter that uses MPE Class files to: open a message file. read the record. format to XML send over the 'wire' to e-Speak engine. The adapter seems okay on our development machine but on our production machine, it throws an exception: java.util.zip.ZipException: error in opening zip file at java.util.zip.ZipFile.open(Native Method) at java.util.zip.ZipFile.<init>(ZipFile.java:69) at java.util.jar.JarFile.<init>(JarFile.java:71) at java.util.jar.JarFile.<init>(JarFile.java:58) at com.hp.mpe.Intrinsic.loadFromJar(Intrinsic.java:74) at com.hp.mpe.MPEFile.HPFOPEN(Compiled Code) at vsPurchaseOrderAdapter.main(vsPurchaseOrderAdapter.java:1478) Exception in thread "main" java.lang.NullPointerException at com.hp.mpe.MPEFile.HPFOPEN(Compiled Code) at vsPurchaseOrderAdapter.main(vsPurchaseOrderAdapter.java:1478) Please help. rgds, daniel