In any visible Wolfram process, save all of your work and close your Wolfram System.To close all Wolfram processes on a Windows machine: If you would like to run more simultaneous processes than you have currently purchased, please contact our sales team. If you are still unable to start the correct number of processes after a restart, contact Wolfram Technical Support. If the message persists, please restart the machine, as this forces all processes to end. Close these processes using your operating system’s task manager. If you reach your license limit unexpectedly, you may have ghost Wolfram processes running in the background. This returns the number of controlling processes your Wolfram System can run simultaneously. To look up how many processes you purchased with your license, evaluate $MaxLicenseProcesses from within a desktop Wolfram Language session. The License Limit Reached message indicates that you are attempting to run more simultaneous Wolfram processes than your license allows. Read this article in: Deutsch, Español, Français, 日本語, 한국어,

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