Products > PSOP > Documentation Why does PSOP say I'm out of logins? PSOP uses the Primavera API. Your Primavera license determines how many people may use the API simultaneously. If all of the licenses you have purchased are currently in use, PSOP cannot run. To solve this problem, either identify the software that is using your licenses and close it or buy more licenses from Primavera. You should never run multiple simultaneous instances of PSOP. Always close all running instances of PSOP before starting a new PSOP session. In addition to data corruption issues, each running instance of PSOP will use a license and that can cause you to run out of logins. In some circumstances P3e can lose track of how many licenses are still available. See the Primavera Knowledge base Article number prim8425 for more information. Back to FAQ