Hi Sunil, the title is for a brief description of the question, not for all the text of your question. That belongs to the body, where you put merely a screenshot without any text. I'm fixing the second thread of yours today, so it's clearly something you didn't make just once by mistake.
Let me change the title from "i made account structure mandatory like below screen shot. when i am posting project invoice proposal throwing error as You must select a value in the BusinessUnit field in combination with the following dimensions values that are valid please see below" to "Posting project invoice proposal: You must select a value in the BusinessUnit field" and put the text to the body. I'll also delete tags i have given project contract also, please help me on this and why it is showing error. because they aren't useful classifications of the question.