---
title: Warnings and errors in GLUCUBE measurement
description: Possible solutions to warnings and errors that may occur in GLUCUBE measurement
---
[Skip to content](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#main-content)
- [English](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement)
- [Español](https://kw.glucube.com/support/errores-durante-la-medicion)
English
Show submenu for translations
[](https://www.glucube.com/)
- [Conoce GLUCUBE](https://www.glucube.com/)
- [Cómo funciona](https://www.glucube.com/como-funciona/)
- [Para quien es](https://www.glucube.com/glucometro-sin-pinchazo-diabetes-tipo-2/)
- [Comprar](https://www.glucube.com/comprar-medidor-glucosa-sin-pinchazo/)
- [GLUCUBE Panel](https://panel.glucube.com/es/welcome/professional/login)
Open main navigation
Close main navigation
- [Conoce GLUCUBE](https://www.glucube.com/)
- [Cómo funciona](https://www.glucube.com/como-funciona/)
- [Para quien es](https://www.glucube.com/glucometro-sin-pinchazo-diabetes-tipo-2/)
- [Comprar](https://www.glucube.com/comprar-medidor-glucosa-sin-pinchazo/)
- [GLUCUBE Panel](https://panel.glucube.com/es/welcome/professional/login)
- - [English](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement)
- [Español](https://kw.glucube.com/support/errores-durante-la-medicion)
English
Show submenu for translations
- [Report an issue](https://lp.glucube.com/es/ticket-glucube-support)
[Report an issue](https://lp.glucube.com/es/ticket-glucube-support?hsLang=en)
How can we help you?
- There are no suggestions because the search field is empty.
1. [Help Center | GLUCUBE](https://kw.glucube.com/en/support?hsLang=en)
2. [GLUCUBE APP](https://kw.glucube.com/en/support/glucube-app?hsLang=en)
# Warnings and errors in GLUCUBE measurement
## Possible solutions to warnings and errors that may occur in GLUCUBE measurement
When taking a measurement with GLUCUBE device, various problems may occur due to incorrect use of the device.
If after taking the measurement a green screen does not appear showing a glucose value, this is because there has been an error during the measurement.
Warnings and errors are coded and will appear in the upper left part of the screen:
The different error categories that may appear are:
- [Category E1](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#category1)
- [Category E2](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#categoriae2)
- [Category E3](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#category3)
- [Category E4](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#categoriae4)
- [Category E5](https://kw.glucube.com/en/support/warnings-and-errors-in-glucube-measurement#categoriaE5)
### Category E1:
If this error code appears, follow these instructions:
- **Press exit**
- **Restart** the **phone**
- Turn on the device and **repeat** the measurement process
If the error persists, please contact Customer Service
### Category E2
#### E2-1
This message may appear when starting a GLUCUBE measurement.
The possible **causes** for this error are:
- The maximum waiting time between turning on the device and inserting the finger has passed.
The **solutions** for this type of error are:
- Press cancel and repeat a measurement, this time making sure that no more than 10 seconds pass between turning on the device and inserting the finger.
If the problem persists, please contact Customer Service
#### E2-2
This message may appear during STEP 1 during the signal check step.
The possible **causes** for this error are:
- The finger was not in the correct position when preparing the measurement and therefore the measurement has not started.
The **solutions** for this type of error are:
- Take another measurement, making sure that the finger perfectly covers the window inside the device without applying pressure.
- Follow the instructions for use of the device and place your finger correctly
If the problem persists, please contact Customer Service
#### E2-3 ... E2-5
If this error code appears, follow these instructions:
- **Press** **exit**
- **Restart** the **phone**
- Turn on the device and **repeat** the **measurement** process
If the error persists, please contact Customer Service
### Category E3
#### E3-1 ... E3-9
This message appears after having performed the GLUCUBE measurement.
The possible **causes** of this error are:
- Slight movements that have caused instability in the signal
- Forced breathing that may have caused instability in the signal
- Very cold hands that do not allow a correct signal to be detected
- Taking the measurement on an unstable surface
- Using nail polish or acrylic nails that may make it impossible to detect the signal
The **solutions** for this type of error are:
- Keep the hand as stable as possible, avoiding movements
- Avoid forced positions that prevent the correct flow of blood in the hand
- Take the measurement on a stable surface
- Breathe calmly, avoiding forcing breathing
- Make sure that the finger correctly covers the window and is in a correct position following the instructions for use of the device
If the problem persists, please contact Customer Service
### E3-10
This message appears after having taken the GLUCUBE measurement.
The possible **causes** of this error are:
- Changes in the signal captured by the device compared to the previous measurement, which has affected the estimation of blood glucose levels.
The **solutions** for this type of error are:
- Perform a new measurement to obtain a more accurate result.
- Follow the instructions for use of the device and make sure that the finger correctly covers the window and is in a correct position.
If the error persists, please contact Customer Service.
#### E3-100
The possible **causes** for this error are:
- Communication failure with the cloud service
The **solutions** for this type of error are:
- Press “Exit” and turn the device back on to perform a measurement.
If the problem persists, please contact Customer Service
#### E3-101
The possible **causes** for this error are:
- Problems in data transmission and decompression
The **solutions** for this type of error are:
- Change the hardware configuration to "adaptive" mode from the "About the device" section
If the problem persists, please contact Customer Service
#### E3-102
The possible **causes** for this error are:
- Incomplete or incorrectly filled profile data
The **solutions** for this type of error are:
- Check the data in the "Adaptive" section of the "About the device" section
If the problem persists, please contact Customer Service
### Category E4
#### E4-1 ... E4-3
If you see this error code, follow these instructions:
- **Press exit**
- **Restart** your **phone**
- Turn on the device and **repeat** the **measurement** process
If the problem persists, please contact Customer Service
#### E5 Category
If this error code appears, follow these instructions:
- **Press** **exit**
- **Restart** the **phone**
- Turn on the device and **repeat** the **measurement** process
If the error persists, please contact Customer Service
- [Getting started](https://kw.glucube.com/en/support/getting-started?hsLang=en)
- [GLUCUBE device](https://kw.glucube.com/en/support/glucube-device?hsLang=en)
- [GLUCUBE APP](https://kw.glucube.com/en/support/glucube-app?hsLang=en)
- [Glucube Panel](https://kw.glucube.com/en/support/glucube-panel?hsLang=en)
- [FAQs](https://kw.glucube.com/en/support/faqs?hsLang=en#main-content)
- [General](https://kw.glucube.com/en/support/faqs?hsLang=en#general)
- [Purchasing and logistics](https://kw.glucube.com/en/support/faqs?hsLang=en#purchasing-and-logistics)
- [Technical](https://kw.glucube.com/en/support/faqs?hsLang=en#technical)
[](https://www.glucube.com/)
Copyright © 2025, iGluco Tech S.L.
[mailto:email@email.com](mailto:email@email.com)