What does "Unable to decode output address" mean?

[tyz]

When I looked up an address on blockchain.info, I found a transaction with the message "Unable to decode output address " standing above the receiving address. What does this mean?  

[achow101]

When I looked up an address on blockchain.info, I found a transaction with the message "Unable to decode output address " standing above the receiving address. What does this mean?  

It means that the output script is not an address but rather a custom script. Typically this is an OP_RETURN output which encodes 80 bytes of arbitrary data into the transaction.

[cr1776]

When I looked up an address on blockchain.info, I found a transaction with the message "Unable to decode output address " standing above the receiving address. What does this mean?  

There is a similar discussion here:

https://bitcointalk.org/index.php?topic=1453347.0

With a bit more detail.