The CLI basexclient uses the same client api as other clients found here yes? https://docs.basex.org/wiki/Clients

from basexclient CLI

>BINARY GET lib/example.jpg

as expected, returns the jpg I PUT from there from my client app. However, the same command BINARY GET from my client app, using

COMMAND	`{command}`	`{result} {info} \00`

does not return the jpg. The bytes going to the basex server, at least the command 'BINARY GET lib/example.jpg' part are identical in both cases.