Customize the reference field in FI document from billing document
Is it possible to customize the reference field in FI document made by saving the billing document? Currently, in the copying control of billing header, the reference number is blank. It means the reference field in FI document will be same as billing document number. But I wanna remove the leading zero so that the reference field contains 12345678 even the billing document is 0012345678.
I have tried to code in the user exit ZXVVFU01 of EXIT_SAPLV60B_001 but return error. For this problem, hope someone could give me a hints or valuable idea.