My guess is that it's trying to build the complete filter even before it 
runs, so that's why you hit the recursive limit. That is, it's not running 
one filter, running the next, testing, etc. It's trying to build the whole 
thing, which has no way of exiting.

Since you know about how many levels, maybe you could prevent the over-run 
like this:

\define subfilter-test5() [tagging[]] [tagging[]]
\define subfilter-test4() [tagging[]] [tagging[]subfilter<subfilter-test5>]
\define subfilter-test3() [tagging[]] [tagging[]subfilter<subfilter-test4>]
\define subfilter-test2() [tagging[]] [tagging[]subfilter<subfilter-test3>]
\define subfilter-test()  [tagging[]] [tagging[]subfilter<subfilter-test2>]

<$set name="test" filter="[[HelloThere]subfilter<subfilter-test>]">
  <$list filter="=[enlist<test>]" template="$:/core/ui/ListItemTemplate" />
</$set>

You can add on as many levels as you think you'll ever need. 

On Sunday, April 18, 2021 at 12:01:51 PM UTC-7 Yaisog Bonegnasher wrote:

> Hi,
> I recently tried to create a recursive subfilter to find all tiddlers 
> below a certain tag, no matter how many levels deep (similar to the *kin* 
> filter, which  is too slow for my large wiki). Unfortunately, I was greeted 
> with a red-message-box-of-death informing me of too much recursion. 
> However, there should only be a couple of levels.
> Are recursive filters at all possible or am I doing something wrong?
> For a quick example, try this in a new tiddler on tiddlywiki.com:
> \define subfilter-test() [tagging[]] [tagging[]subfilter<subfilter-test>]
>
> <$set name="test" filter="[[TableOfContents]subfilter<subfilter-test>]">
>   <$list filter="=[enlist<test>]" template="$:/core/ui/ListItemTemplate" />
> </$set>
> Any enlightment is greatly appreciated.
> Best regards
> Yaisog
>

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