---
title: "No webpage was found for the web address: http://127.0.0.1:8081/calc"
url: "https://openforis.support/questions/1778/no-webpage-was-found-for-the-web-address-http1270018081calc"
tags: ["calc"]
status: "answered"
score: 0
answer_count: 1
asked: "2018-05-04T17:57:23"
last_activity: "2018-05-08T18:08:26"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# No webpage was found for the web address: http://127.0.0.1:8081/calc

Asked by saucedo on 2018-05-04

Hi Mino, 
I downloaded Calc + postgres + R + Rstudio (R and Rstudio were installed before in my computer) but when I try to open Open Foris Calc Control Panel the browser shows me the error HTTP 404 No encontrado (Page not found).
Can you help me please?
Thank you very much.
J.


## Answer (score 0, by Mino Togna on 2018-05-08)

Link: https://openforis.support/questions/1778/no-webpage-was-found-for-the-web-address-http1270018081calc/1784

Hi J,

if the webpage is not available them some issue during the installation occurred.

Make sure you have followed the installation instruction from the website; in particular: 

 - make sure the postgres password you entered during the installation of Calc is the one you have set for postgres user when installing Postgres database (also note that Calc expects postgres running on port 5432)
 - make sure the R is not installed in program files folder; e.g. C:\opt\R 


Please let me know if this helps.

Thank you

Mino