I have an issue regarding revenues Account (7* G/L accounts) to be posted manually (FB01,FB60...).
For this posting only one Cost object (WBS or IO or cost center) is needed.
The problem is that I can not define a Field status group who require only one assignement, either WBS or IO or COPA.
Thus, a validation rule creation is needed to check that there is one CO assignement.
How can I create this validation rule ?
Thanks for help