Thank you Maath, now it is working correctly. sequence number is a problem. now solved.

@sridhar My pleasure that my effort helped you , can you select my answer as the solution

Very thankful for your help...

@sridhar Thanks , But why do not tic my answer as the solution and vote up my answer ?

Mr. Maath one more problem is there, if that employee didn't put any leave for a particular month this Loss of pay concept didn't work. i need if employee get leave means Lop calculation otherwise it is not needed. I think i need to change in Condition is changed to Python Expression its correct.

@sridhar you need to post new question about the condition when to apply this rule , of course you need to put python code to check total leave for employee . Please send me the link of your question after post it.

Error! Wrong python condition defined for salary rule this link, i cant post a link this a title of the error solve it please.

@sridhar , I am too now have the same error ! even when calculate for new month (Next month) there is wrong result (Sum (all of leave )) we need to Sum of leave for that month only

@sridhar , But when I create Payslips Batch the operation completed without any error! can you try that and then writ new question here so we will find some one solve this problem .

i can't do further process please do my demo database sridhartestopenerp@gmail.com password openerpmass db kgsridhar put one entry i will understand please do.

@sridhar I will do Are you ready ?

u put entry i will see now...

create one new employee or existing employee...

@sridhar No, You can do it just create new Payslips Batch

ok i put entry...

Error only comming...

Finally I solved the problem Vote me up if helped http://help.openerp.com/question/16131/unpaid-leaves-deduction-not-working/