Upon mistyping ". as $: , the error message runs together datatypeS:
$ j
JVERSION
Engine: j904/j64avx2/linux
Beta-k: commercial/2023-01-24T04:46:13
Library: 9.04.10
Platform: Linux 64
Installer: J904 install
InstallPath: /home/lambertdw/downloads/installs/j904
Contact: www.jsoftware.com
_&$:^:(''&(-:&datatype))S:0 'a';3
|domain error, executing monad _&$:^:''&-:&datatypeS: 0
| _&$:^:(''&(-:&datatype))S:0'a';3
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