Disable error message in applescript application

Question

I have an applescript application that basically tests for a certain condition.  If that condition is met, it does one task.  If there is an error, it performs another task.  The problem is that when it runs as an application, if it runs into the error, it pops up a message box with that error.  I would like it to just continue to the portion of what to do when the error occurs and not bother the user unless really needed. 
Here's the script I've made into an application that this is occuring in (was originally found on some other forums and modified for our need):
try
  -- test for Kerberos ticket presence and attempt to renew
          set kerb to do shell script "/usr/bin/klist | /usr/bin/grep krbtgt"
on error
          try
                    set renewKerb to do shell script "/usr/bin/kinit -R"
          on error
                    set ping to do shell script "ping -o -q xxxx.xxxxxx.com"
                    --Server name change to protect our innoconce.
                    if not (ping is equal to "") then
  -- offer to renew Kerberos ticket
                              set response to (display dialog "Your Kerberos ticket has expired. Would you like to authenticate to generate a new ticket?" with icon 2 buttons {"No", "Yes"} default button "Yes")
                              if button returned of response is "Yes" then
                                        try
                                                  set thePassword to text returned of (display dialog "Enter your logon password:" default answer "" with hidden answer)
                                                  do shell script "/bin/echo '" & thePassword & "' | /usr/bin/kinit"
                                                  display dialog "Kerberos ticket acquired." with icon 1 buttons {"OK"} default button 1
                                        on error
                                                  try
                                                            set thePassword to text returned of (display dialog "Password incorrect. Please try again:" default answer "" with icon 2 with hidden answer)
                                                            do shell script "/bin/echo '" & thePassword & "' | /usr/bin/kinit -l 10h -r 10h --password-file=STDIN"
                                                            display dialog "Kerboros ticket acquired." with icon 1 buttons {"OK"} default button 1
                                                  on error
                                                            display dialog "Too many incorrect attempts. Stopping to avoid account lockout." with icon 2 buttons {"OK"} default button 1
                                                  end try
                                        end try
                              else -- if No is clicked
                                        quit
                              end if
                    else
  quit
                    end if
          end try
end try

Answer 1

I think I figured it out.  I added another try on error on the ping part and it fixed the issue.  The error was showing up on the ping part so it should be ok now.