Hi iam getting below error in production  when ever i click on the button on a related list on the case object that  to only one particular case.But in my developer sandbox  it is working fine .what may be the problem.Can anybody help on this.

 


And below is the code behind that button.

{!REQUIRESCRIPT("/support/console/26.0/integration.js")}
srcUp('/apex/PPS_CaseHolderPage?id={!Case.Id}&btname=New_Service_Order');



Regards,
Isha