April 5, 201510 yr Not enough info - My guess is you are making custom container, in that case: You will need to override and customize transferStackInSlot and/or mergeItemStack to fit your code (sizes of container slots). 1.7.10 is no longer supported by forge, you are on your own.
April 5, 201510 yr Hi This tutorial project will show you how to write transferStackInSlot properly. https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/java/minecraftbyexample/mbe30_inventory_basic/ContainerBasic.java -TGG
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