Nu RPC command gettxout bug?

With nud v2.1.0, this works
./nud gettxout 7600a47ecc93cde8acf3694cbb228fde3779b74ae6dd2a7db30d8fd8d1036140 0

These don’t and just quietly quit
./nud gettxout ee48f2c5779620e700daec952a051af3a28bd0bbdc1675f34f111093d174d861 0
./nud gettxout 777f78bd2066ab835de96d4afec5a59fed6a56e56fccb8daab5d1047357e5744 0

all three tx’s are from the same block 5945.

Anyone know why?