@sameer thanks for ur replay but i created rule like this : Condition based on result = employee.place_of_birth == 'egypt' or false and the rule is result=-contract.wage*0.07 but it give me Wrong python condition defined for salary rule employee.

The condition and rule are totally correct , i use it before and work perfectly . you have to check the salary structure if there is any wrong .

@sameer Can u post ur rule to compare with my rule

condition is =>> result = employee.marital == 'single' or false rule ==>> result=contract.wage*0.7

Thanks sameer it works fine