When typing a Name (not Label) for a custom DOpus command, spaces ( ) are automatically converted to underscores (_), which makes perfect sense. I’m actually in the habit of typing command names/labels/tips/instructions in a text editor, then copying from there and pasting to the respective fields in the DOpus Command Editor window, and noticed, when I inadvertently copied what I intended to be a Label but pasted it to the Name field, the included spaces were not converted, and, of course, the command failed when I tried to use it. Another possible bug or oversight?
Good catch! In the next update the user command name field will process pasted text the same as it processes typed text.