Here is how I invoke my service : Vector ret = (Vector)call.invoke(new Object[]{ "PDF",bundleName,templateType, ""} The service is invoked from the client. The web service is deployed using axis-1_1 in jwsdp-1.2 . The web service is processed and returns a vector. The web service logs show that the returned vector is not null. But my client logs show after the invoke method: Dpk: .. the error message is :; nested exception is: java.lang.NullPointerException Please help me to debug this issue. I am using java version "1.5.0_06 on Mac OSX servers (both the client and the server) --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx