In most cases It's important to very first fix the situation that triggered this point out then reconnect manually utilizing plugin context menu explained under. Alternativelly you can just restart AmiBroker. The 64 bit Variation of AmiBroker lets you raise this to several Gigabytes - 4000MB is a good https://amibrokerdatafeed59257.blogocial.com/5-essential-elements-for-amibroker-data-feed-64104329