---
title: "Common Error Messages"
canonical: "https://support.mercell.com/space/MBTNO/196904912153/Common%20Error%20Messages"
format: markdown
---
This support article provides insights into reading the field feedback/warnings within the Mercell Forms fields
> ⚠️ **Note:** Please note that this is a generic example and does not encompass an exhaustive list of all possible warnings. The forms contain numerous fields, each requiring specific input, so consider this article as a guide to comprehend the feedback. Additionally, it's important to be aware that each mandatory field may have dependencies on other fields within the form, and the feedback may be interconnected.
### **Front-end feedback**
Example: *The expected format is an amount like 1234.56*
The input of the field is invalid, the expected input is **numeric**, instead of **text**. Bear in mind that front-end errors have a simplified text and are quite straight forward, in this case you must enter a numeric value.
Let’s take a look at a more complicated field feedback, Back-end feedback.
### **Back-end feedback**
Example: *For a given lot, if 'Maximum number of candidates to be invited for the second stage of the procedure' ****(BT-51) ****was set, then 'The criteria will be used to select the candidates to be invited for the second stage of the procedure' ****(BT-40) ****must be 'yes' for at least one of 'Selection criteria' (BG-702) of lots (forms 16, 17, 18, 20, 21, 22, 23 and 24)*
In this instance, there is a correlation between field **BT-51** in the **Second stage **(Procedure) and a field located within the **Selection Criteria **(Participation) subsection, specifically field **BT-40**.
You have two options: either include a **Selection criteria**, and select ‘*Yes*’ on field **BT-40 **(See image below).** **Or *(Text continues under the image)*
Modify the current selection within the **Second Stage** subsection, where field **BT-51 **is situated.
*Article Ref: 3103251425*