---
title: "Error installing calc"
url: "https://openforis.support/questions/475/error-installing-calc"
tags: ["calc"]
status: "closed"
score: 0
answer_count: 1
asked: "2016-02-19T07:17:42"
last_activity: "2016-02-19T11:58:16"
source: "Open Foris Support - Q&A Forum"
license: "Copyright Open Foris, 2026. Some rights reserved under creative commons license."
---

# Error installing calc

Asked by wexxo on 2016-02-19

Dear all,

Having considered the installation requirements and procedure, I still do have problems getting calc to run. After trying to start calc I get following error msg:

Error: R.DLL version does not match (DLL:3.2.3, expecting: 3.1.0)

I guess I have a version of something that is very new (3.2.3) and should be 3.1.0, but what is it? R?

Thanks in advance for hinting which software I would have to downgrade!

Best regards,


## Accepted answer (score 0, by Mino Togna on 2016-02-19)

Link: https://openforis.support/questions/475/error-installing-calc/480

Dear wexxo,

Calc1 needs to use R 3.1. From what i see, you have probably installed R 3.2.

Here, you can see all the installation requirements: http://www.openforis.org/tools/calc/tutorials/installation.html 

During the last months, we realized that the integration between R and Calc (through Java), implemented using rJava library, is not the most efficient solution that meets the flexibility requirements that Calc should have.

For this reason, we're currently working on the new version of Calc (Calc 2.0); this version will remove the constraints of using a specific version of R and will also make the installation more error free. 

The new version should be available in a very near future (probably a week or two). 
Please stay tuned, or let me know if you want to receive an email when it will be available.

Thank you,

Mino