diff --git a/src/main.lua b/src/main.lua
index ec74da2..f1ffaf7 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -902,7 +902,7 @@ while true do
             print("Paired. Splitting stacks and sending out...")
             stacks = VP_splitstack(stacks, #accepted+1) -- plus 1 because we also build as the master turtle.
             if #stacks["stacks"] ~= #accepted+1 then
-                printError("Internal error with VP_splitstack.")
+                printError("Internal error with VP_splitstack. It returned "..#stacks["stacks"].." stacks.")
                 return
             end
             for i,v in pairs(accepted) do