# Formula field error **URL:** \ **Category:** Ask for Help\ **Created:** [October 22, 2024, 6:01am UTC](https://community.noloco.io/t/formula-field-error/1362 "2024-10-22T06:01:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![sdelgado](https://avatars.discourse-cdn.com/v4/letter/s/3be4f8/32.png) [@sdelgado](https://community.noloco.io/u/sdelgado)\ **Post date:** [October 22, 2024, 6:01am UTC](https://community.noloco.io/t/formula-field-error/1362/1 "2024-10-22T06:01:42Z")
Hi, I’m trying to use the formula field, but it doesn’t work, can anyone help me with this issue? ![image](https://europe1.discourse-cdn.com/flex005/uploads/noloco/original/1X/590d85cf376362a5569021f5bff07bb466815a8e.png) Thanks!! ---
**Author:** ![darragh](https://dub1.discourse-cdn.com/flex005/user_avatar/community.noloco.io/darragh/32/12_2.png) [@darragh](https://community.noloco.io/u/darragh)\ **Post date:** [October 22, 2024, 6:10am UTC](https://community.noloco.io/t/formula-field-error/1362/2 "2024-10-22T06:10:19Z")
Hi @sdelgado and welcome to the Community! This seems similar to this post: [Problem formating formula field - #2 by darragh](https://community.noloco.io/t/problem-formating-formula-field/282/2) If youre field `Respuesta 1 - SU` is a single option field, then you need to use the _internal_ name, which you can find by putting that value in a formula on it’s own. In your case it’s probably `BAC_1_PLASTICO` It’s upper, snake\_case `Open` becomes `OPEN` `Closed` becomes `CLOSED` `Awaiting approval` becomes `AWAITING_APPROVAL` And so on ---
**Author:** ![sdelgado](https://avatars.discourse-cdn.com/v4/letter/s/3be4f8/32.png) [@sdelgado](https://community.noloco.io/u/sdelgado)\ **Post date:** [October 22, 2024, 6:48am UTC](https://community.noloco.io/t/formula-field-error/1362/3 "2024-10-22T06:48:19Z")
It works!!! thanks for the answer!