I need to create a sales line not more than three for a single customer?

Priyankaritesh

Can anyone tell me please how to create only three sales Line in sales order for a single customer . if the same customer tries to create it should show error. please tell me how to do it . thanks

pradi

On the release button, add a new function. Count the no. of lines in sales line if it's more than 3 pop up an error message.