# Errors when adding "matrix" format R file using resource

**URL:** https://datashield.discourse.group/t/errors-when-adding-matrix-format-r-file-using-resource/365
**Category:** Analyst Support
**Created:** [2 March 2021 11:39 UTC](https://datashield.discourse.group/t/errors-when-adding-matrix-format-r-file-using-resource/365 "2021-03-02T11:39:34Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![HankCao](https://avatars.discourse-cdn.com/v4/letter/h/b782af/32.png) [@HankCao](https://datashield.discourse.group/u/HankCao)
#### Post date: [2 March 2021 11:39 UTC](https://datashield.discourse.group/t/errors-when-adding-matrix-format-r-file-using-resource/365/1 "2021-03-02T11:39:34Z")

</div>

Hi all,

I uploaded a “rData” data into opal and then add this as the resource, see below

 ![image](https://global.discourse-cdn.com/free1/uploads/datashield1/original/1X/d2f64553c98b7274ef09dc578f42ae04e79a66be.png)

However, the error occupied during the data format transformation

```
> builder <- DSI::newDSLoginBuilder()
> builder$append(server="s2", url = "http://192.168.56.101:8080/", user = "administrator", password = "datashield_test&", driver = "OpalDriver")
> 
> logindata <- builder$build()
> datasources <- DSI::datashield.login(logins = logindata)
> datashield.symbols(datasources)
> 
> datashield.assign.resource(datasources,symbol="res",resource = "omics.opal2")
> datashield.assign.expr(conns = datasources, symbol = "rse", expr = quote(as.resource.object(res)))
> 
> datashield.errors()
> $s2
> [1] "Command 'as.resource.object(res)' failed on 's2': Error while evaluating 'is.null(base::assign('rse', value={resourcer::as.resource.object(res)}))' -> Error in get(private$.symbol, envir = private$.env) : \n invalid first argument\n"

```

Does anyone know how to fix it?

Regards,

Hank

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<div class="post-metadata">

### Author: ![yannick](https://yyz2.discourse-cdn.com/free1/user_avatar/datashield.discourse.group/yannick/32/19_2.png) [@yannick](https://datashield.discourse.group/u/yannick)
#### Post date: [2 March 2021 12:13 UTC](https://datashield.discourse.group/t/errors-when-adding-matrix-format-r-file-using-resource/365/2 "2021-03-02T12:13:54Z")

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Hi,

Looks like you have not provided some credentials. In the case of Opal, a [personal access token](https://opaldoc.obiba.org/en/latest/web-user-guide/my-profile.html#personal-access-tokens) is mandatory.

Yannick

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<div class="post-metadata">

### Author: ![HankCao](https://avatars.discourse-cdn.com/v4/letter/h/b782af/32.png) [@HankCao](https://datashield.discourse.group/u/HankCao)
#### Post date: [2 March 2021 13:01 UTC](https://datashield.discourse.group/t/errors-when-adding-matrix-format-r-file-using-resource/365/3 "2021-03-02T13:01:03Z")

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Thanks, the problem solved.

Regards, Hank