ContributionsMost RecentMost LikesSolutionsRe: run parallel multiple projects with ReadyAPI Hi Rich, Thank you very much for your reply and information! I actually meant if we can run more than one test runner instances on the same PC, when we have one fixed ReadyAPI license used on this PC. So I was running a few irrelated tests in parallel , and got into this error below: Running TestRunner in parallel causes the "Invalid maximum heap size: -Xmx" error. How to avoid it? | SmartBear Software Following the solution in this article, I then was able to run multiple irrelated tests in parallel, using the same one ReadyAPI test runner on my PC (with a fixed ReadyAPI license). thanks again for answering my question. kind regards, lea run parallel multiple projects with ReadyAPI Can the same ReadyAPI license be used to run multiple projects in parallel? and if yes, is the limit the same as the 'the number of allowed concurrent product instances' mentioned below? https://support.smartbear.com/readyapi/docs/general-info/licensing/id-based/index.html The license can be used on any physical, virtual, or cloud computer. You can install the product on multiple machines and easily switch between them. To make a license available for usage on another computer, simply stop the product on your current machine. The number of allowed concurrent product instances is set by your license.