Issue in Calculation View CE

Hi,

I am facing an issue in Calculation view while using CE engine functions.

I searched for answers but I couldn't find one.

    tabl = ce_column_table("SAPCRP"."SRRELROLES",["OBJKEY","OBJTYPE","ROLETYPE","ROLEID","UTCTIME"]);

    tab2 = CE_PROJECTION(:tab1,["OBJKEY"]);

when I try to activate it, it throws the below error. I double checked the syntax as well. Error while accessing :tab1.

Message :

  Internal deployment of object failed;Repository: Encountered an error in repository runtime extension;Internal Error:Deploy Calculation View: SQL: transaction rolled back by an internal error: Variable depends on an unassigned variable: TAB1: line 9 col 26 (at pos 510)nSet Schema DDL statement:

Please help.