Gerald,

If what you intended worked, the result would be;

[[<currentTiddler>removeprefix[Körpertyp:]]split[-]reverse[]join[.]]
Both [[ and ]] are invalid

Another problem I see is because variables inside filters, and fields 
etc.... only use one set of brackets
<$vars datum={{{ [<<datum0>>split[-]reverse[]join[.]] }}} >
Would be
<$vars datum={{{ [<datum0>split[-]reverse[]join[.]] }}} >

In filters only one bracket is required, but outside two brackets are 
needed otherwise they would be confused with HTML tags `<p>` etc...

Lets see if that gets you any further.

Bu the way one way to combine filters is using the subfilter operator 
https://tiddlywiki.com/#subfilter%20Operator

If you are still lost perhaps explain what you want rather than how it does 
not work.

Regards
Tony


On Monday, March 23, 2020 at 9:25:40 PM UTC+11, Gerald Weis wrote:
>
> Hi friends,
>
> i am trying to combine 2 filters.
>
> but its don't work
>
> thats my code and i don't know whats wrong.
>
> \define tabcaption()
> <caption>Messergebnis am
> <$vars datum0={{{ [<currentTiddler>removeprefix[Körpertyp:]] }}} >
> <$vars datum={{{ [<<datum0>>split[-]reverse[]join[.]] }}} >
> <<datum>>
> </$vars>
> </$vars>
> </caption>
> \end
>
> Whats my Mistake
>
> Tahnks for Help
>

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