make clear that specific output channel must be specified for view()

pinin4fjords · web-flow · commit 9e857e15fb71 · 2024-09-25T17:39:48.000+01:00
diff --git a/docs/basic_training/processes.md b/docs/basic_training/processes.md
@@ -924,6 +924,8 @@ workflow {
 }
 ```
 
+This command will produce an error message, because `.view()` operates on single channels, and FOO.out contains multiple channels. 
+
 If a process defines two or more output channels, each channel can be accessed by indexing the `.out` attribute, e.g., `.out[0]`, `.out[1]`, etc. In this example you only have the `[0]'th` output:
 
 ```groovy linenums="1" title="snippet.nf"

Original file line number	Diff line number	Diff line change
`@@ -924,6 +924,8 @@ workflow {`
`924`	`924`	`}`
`925`	`925`	```
`926`	`926`
	`927`	+This command will produce an error message, because `.view()` operates on single channels, and FOO.out contains multiple channels.
	`928`	`+`
`927`	`929`	If a process defines two or more output channels, each channel can be accessed by indexing the `.out` attribute, e.g., `.out[0]`, `.out[1]`, etc. In this example you only have the `[0]'th` output:
`928`	`930`
`929`	`931`	```groovy linenums="1" title="snippet.nf"