getting Session state protection violation error for a hidden item that is being set with computation before header - Oracle APEX
I am trying to set the label of an item dynamically using the value of an other hidden item in the same page.
I created a computation for the hidden item in the page and set the value of the item as the dynamic label - &P613_EMPLOYEE_TYPE_LABEL.
But I am getting this error
Session state protection violation: This may be caused by manual alteration of protected page item P613_EMPLOYEE_TYPE_LABEL.
Technical Info (only visible for developers)
is_internal_error: true
apex_error_code: APEX.SESSION_STATE.ITEM_VALUE_PROTECTION
component.type: APEX_APPLICATION_PAGES
component.id: 149000000613
component.name: DETAILS OF EMPLOYEE
error_backtrace:
----- PL/SQL Call Stack -----
object line object
handle number name
0x263d96750 935 package body APEX_050100.WWV_FLOW_ERROR
0x263d96750 1003 package body APEX_050100.WWV_FLOW_ERROR
0x263d96750 1395 package body APEX_050100.WWV_FLOW_ERROR
0x26ac006a8 3116 package body APEX_050100.WWV_FLOW
0x26ac006a8 5533 package body APEX_050100.WWV_FLOW
0x265a48af8 2 anonymous block
But I have set the session state protection fo the item to 'unrestricted'
page settings
computation
component settings
Answer
For your hidden item P613_EMPLOYEE_TYPE_LABEL set the Value Protected attribute to NO.
When Value Protected of an hidden item is set to YES a checksum is generated when your page is loaded. When you submit the page with a different value the checksum is not valid anymore and you get the error.