Generally It's important to to start with fix the issue that triggered this state and afterwards reconnect manually using plugin context menu described below. Alternativelly you'll be able to just restart AmiBroker. The 64 bit Edition of AmiBroker lets you raise this to lots of Gigabytes - 4000MB is https://waylonyyvtq.answerblogs.com/28148680/the-greatest-guide-to-amibroker-data-feed