Cannot delete the applet

Question

i'm working on JCOP in Eclipse and have a big problem now. normally i can install, select, and send command and finally delete applets. but the recent applet(performing class Cipher testing) i've installed, selected and run, but it can't be delete. attempting to delete always return error code 6985 and the applet stucks forever!! so i wanna know how can i delete such the applet? and can we replace the applet with a new one that has the same AID?
the trouble code is:
public static byte constructor01(){
          try{
               cip = new CipherTestClass();
          }catch(Exception e){
               return (byte)1;  // FAIL
          return (byte)0;  // PASS
     }the above code always return status word 6985 and the applet cannot be remove
but if i change to this one, the applet can be delete with "delete" command with status word 9000:
public static byte constructor01(){
          try{
               CipherTestClass cip = new CipherTestClass();
          }catch(Exception e){
               return (byte)1;  // FAIL
          return (byte)0;  // PASS
     }Both of the code have no error, can be installed, selected, and run, but only the second that can be remove from card.
thank you

Answer 1

Your first sample seems to store a reference to an object in a static field. You cannot delete an applet if a such a reference exists. (See Java Card specification!)
If you are using a GP211 card, you can delete the entire package using the following JCShell command:
delete -r <pkgaid>