Can’t get system to “find” scp command

Hello, I am trying to run scp (secure copy) command. I keep getting “ksh: scp: not found” error. I get this even when I run the command from the directory that scp (and ssh) are in. I also get it when my command includes the full path to the scp command. Any help would be greatly appreciated. Thanks, Jeff

Here is what I ran:

userID(server1: /fisc/gnu/bin): /fisc/gnu/bin/scp -p /home/userID/test.txt userID@server2:/home/userID/test.txt

And this is what was returned:

ksh: scp: not found
lost connection

Any help on why it is not found would be greatly appreciated. Thanks, Jeff