If you see Minecraft has run out of memory error, your might have to allocate more memory to Minecraft, Reduce video settings, etc.

You might be able to fix the Memory errors and continue playing Minecraft without any problems by attempting each of these procedures one at a time.

How do I fix Java Out-of-memory errors in Minecraft? Minecraft has run out of memory error is mainly related to Java and is often termed as the java.lang.OutOfMemory error.