# Filter not working if field name contains $ or %

**URL:** <https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740>\
**Category:** Support\
**Created:** [January 30, 2018, 4:42am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740 "2018-01-30T04:42:20Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Oblio](https://community.mp3tag.de/user_avatar/community.mp3tag.de/oblio/32/4828_2.png) [@Oblio](https://community.mp3tag.de/u/Oblio)\
**Post date:** [January 30, 2018, 4:42am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/1 "2018-01-30T04:42:20Z")

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The help file indicates that this might be possible but I can't make it work.

e.g. If I have a user-defined field named $123 containing text "ok"

$123 HAS ok  
$123 IS ok  
$123 MATCHES .?  
$123 PRESENT

Nothing works. Same for %123. Maybe it is not possible?

> [@](#):
>
> If in HAS/IS/GREATER/LESS/EQUAL/MATCHES contains $ or % it should be enclosed in double quotation marks and will be treated as a format string instead of a tag field name.

[https://docs.mp3tag.de/filter](https://docs.mp3tag.de/filter)

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**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [January 30, 2018, 5:27am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/2 "2018-01-30T05:27:01Z")

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> [@Oblio](#):
>
> The help file indicates that this might be possible but I can't make it work.
> 
> e.g. If I have a user-defined field named $123 containing text "ok"
> 
> $123 HAS ok  
> $123 IS ok  
> $123 MATCHES .?  
> $123 PRESENT
> 
> Nothing works. Same for %123. Maybe it is not possible?

For the $123 it should be  
%$123%

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<div class="post-metadata">

**Author:** ![Oblio](https://community.mp3tag.de/user_avatar/community.mp3tag.de/oblio/32/4828_2.png) [@Oblio](https://community.mp3tag.de/u/Oblio)\
**Post date:** [January 31, 2018, 2:26am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/3 "2018-01-31T02:26:05Z")

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Thanks ohrenkino! That works.

How about %123 ?

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<div class="post-metadata">

**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\
**Post date:** [January 31, 2018, 6:25am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/4 "2018-01-31T06:25:02Z")

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I think that this an illegal fieldname as the % is a reserved character.

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<div class="post-metadata">

**Author:** ![Oblio](https://community.mp3tag.de/user_avatar/community.mp3tag.de/oblio/32/4828_2.png) [@Oblio](https://community.mp3tag.de/u/Oblio)\
**Post date:** [January 31, 2018, 6:47am UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/5 "2018-01-31T06:47:10Z")

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I think you must be right ☹

Maybe Florian can update the help file.

Or make it work e.g. by escaping the % by using %%

So for %123 you use %%%123%

Please accept this feature request.

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**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\
**Post date:** [February 9, 2026, 12:27pm UTC](https://community.mp3tag.de/t/filter-not-working-if-field-name-contains-or/19740/6 "2026-02-09T12:27:12Z")

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