# How to respond the "load error:gsl?

**URL:** https://community.freefem.org/t/how-to-respond-the-load-error-gsl/110
**Category:** General Discussion
**Created:** [August 14, 2019, 9:05pm UTC](https://community.freefem.org/t/how-to-respond-the-load-error-gsl/110 "2019-08-14T21:05:56Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![nakaikiyohiko](https://avatars.discourse-cdn.com/v4/letter/n/3be4f8/32.png) [@nakaikiyohiko](https://community.freefem.org/u/nakaikiyohiko)
#### Post date: [August 14, 2019, 9:05pm UTC](https://community.freefem.org/t/how-to-respond-the-load-error-gsl/110/1 "2019-08-14T21:05:56Z")

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Dear all,

I am beginner of FreeFem++ version 4.3-1.  
When I run the FreeFem++ script which my colleague made by FreeFem++ version 3.5.6., the run was stop with the following message in command prompt.

Could you please kindly tell me how to response this alert?

-- FreeFem++ v 4.200001 (date Sat, Jun 08, 2019 6:08:22 PM git v4.2.1) Load: lg\_fem lg\_mesh lg\_mesh3 eigenvalue 1 : load "iovtk"(load: loadLibary C:\Program Files (x86)\FreeFem++\\.\iovtk = 0) load: iovtk ; 2 : load "gsl" load error : gsl fail : list prefix: 'C:\Program Files (x86)\FreeFem++\\.\' list suffix : '' , '.dll' current line = 2 Load error : gsl line number :2, gsl error Load error : gsl line number :2, gsl code = 2 mpirank: 0 try getConsole C:\Users\nakai\OneDrive\デスクトップ\version6.edp save log in : 'C:\Users\nakai\OneDrive\デスクトップ\version6.log' wait enter ?