# Raise an error when moving files if a field is empty
**URL:** https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194
**Category:** Support
**Created:** [March 8, 2012, 8:25pm UTC](https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194 "2012-03-08T20:25:08Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@pine65](https://community.mp3tag.de/u/pine65)
#### Post date: [March 8, 2012, 8:25pm UTC](https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194/1 "2012-03-08T20:25:08Z")
Can I get mp3tag to remind me I've forgotten to fill out the composer field and the file isn't quite ready to be moved yet?
---
### Author:  [@pone](https://community.mp3tag.de/u/pone)
#### Post date: [March 8, 2012, 10:19pm UTC](https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194/2 "2012-03-08T22:19:04Z")
How do you move files? With Mp3tag's Converter?
If so, build the following function around your currently used formatstring:
$if(%composer%,,%\_filename%)
This will leave files without a composer tag field where they are.
You know that you can display the composer field in the tag panel? File\>Options\>Tag Panel
---
### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [March 9, 2012, 5:32am UTC](https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194/3 "2012-03-09T05:32:53Z")
> [@pone](#):
>
> You know that you can display the composer field in the tag panel? File\>Options\>Tag Panel
Just to get a "reminder" it would suffice to apply a filter
%composer% IS ""
THis works even with "invisible" fields. (When they are invisible, it is rather hard to edit them without opening the extended tags dialogue, though.)
---
### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [February 9, 2026, 12:23pm UTC](https://community.mp3tag.de/t/raise-an-error-when-moving-files-if-a-field-is-empty/13194/4 "2026-02-09T12:23:43Z")