# Versioning issue for savesol/readsol use?
**URL:** https://community.freefem.org/t/versioning-issue-for-savesol-readsol-use/2306
**Category:** Feature Request
**Created:** [March 2, 2023, 11:21pm UTC](https://community.freefem.org/t/versioning-issue-for-savesol-readsol-use/2306 "2023-03-02T23:21:55Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@plouraboue](https://community.freefem.org/u/plouraboue)
#### Post date: [March 2, 2023, 11:21pm UTC](https://community.freefem.org/t/versioning-issue-for-savesol-readsol-use/2306/1 "2023-03-02T23:21:55Z")
Hi all,
I am new in this forum, so please excuse this question if naive. I am running FreeFem++ v4.7 in MacOs, and trying to use the savesol/readsol commands. In the documentation it seems to come with v4.6 but it is not recognized by my version.
I am doing something wrong ? Should I use a specific plugin ?
Many thanks for any help.
---
### Author:  [@jsmacd](https://community.freefem.org/u/jsmacd)
#### Post date: [March 3, 2023, 11:23pm UTC](https://community.freefem.org/t/versioning-issue-for-savesol-readsol-use/2306/2 "2023-03-03T23:23:04Z")
I’m not sure what version of FreeFEM I’m running but I believe you need to load medit to read and save solutions. So something like:
```auto
load "medit"
mesh Th = square(10);
// ... solve for u ...
savesol("mySol.sol", Th, u, order = 1);
fespace Vh(Th, P1);
Vh uread;
uread[] = readsol("mySol.sol");
```
---
### Author:  [@plouraboue](https://community.freefem.org/u/plouraboue)
#### Post date: [March 4, 2023, 11:23pm UTC](https://community.freefem.org/t/versioning-issue-for-savesol-readsol-use/2306/3 "2023-03-04T23:23:15Z")
> [@jsmacd](#):
>
> `load "medit"`
Yes, medit was the plugin I needed ! Many thanks ! Sincerely, Franck