SCP command not working to copy file but SFTP does

[JustinWithoutAnE]

I am trying to transfer a file from the AS400 to an Azure server using the scp command. Login is done using SSH keys. I am able to login if I use sftp and PUT to transfer the file but not when using scp. It says:

exec request failed on channel 0
lost connection

I was able to use SCP to transfer a file from the same machine to another Azure server.
I use this command:

scp -v -P 8022 'srclib/file.txt' sftpUser@destination:destlib

I can see the programming is able to login to the server, it is just the transfer that is not working.
Could it be a network or port issue?