Error deploying shiny app: could not find function "rep_len"

[Nate Gilbraith]

Hello, 

I have tried several times to upload an app but I getting an error during the deploy process:

Uploading application bundle...DONE
Deploying application: 16823...
Waiting for task: 747792
 building: Processing Bundle Id: 35991
 error: Parsing manifest
Error in paste(rep_len("#", r), collapse = "") :
 could not find function "rep_len"

Thank you very much for the help.

Nate

[Fereshteh Karimeddini]

Nate,

Where is this line of code: paste(rep_len("#", r), collapse = "")

Is this in one of your R scripts? Can you share your code? Or directory structure?

Fereshteh

[Nate Gilbraith]

Fereshteh,

Thanks for helping out with this.

I will share my code when I get back to my computer, but in the meanwhile, I do not have that line of code in any of my scripts. Off the top of my head I believe the only packages I load are 'akima' and 'fields'.

Nate

[Nate Gilbraith]

Fereshteh, 

I have attached my server.R and ui.R files.  I also tried removing the two packages that I load (they are only used to create one figure) but this did not change the error message that occurred when I tried to re-deploy the app.  

Nate

[Fereshteh Karimeddini]

Nate,

Thanks for sending these files. But your application depends on some other files that you did not send. I was able to deploy the app (without those files); app won't work properly, but deploy was successful. So the error must be caused by other files in your application folder. You can either send me all your files (if you don't mind sharing them), or you can try removing the other files from your application directory, one by one, and see at what point your deploy is successful. It is very possible that shinyapps is parsing something incorrectly, but we need to know what is it.

Fereshteh

[Nate Gilbraith]

Fereshteh,

This is all of the files, less 1 data file that is 5.8MB.  If you send me your email I can share it via dropbox or google drive. 

Nate

Nate

[Nicholas Mader]

I'm also having effectively the exact same problem. Relatively simple app (server.r, ui.r, and small data source attached), which I am trying to deploy to shinyapps.io, but receiving the message -- Error in paste(rep_len("#", r), collapse = "") : could not find function "rep_len".

My understanding is that the rstudio server is only running R version 2.15.3 (confirmed from sessionInfo()), and that rep_len() was introduced as of version 3. However, I can't figure out where in my code the rep_len() function is being introduced so that I can work around it.

Thanks for any thoughts!

Nick

[Fereshteh Karimeddini]

Nick, (and Nate)

The error is coming from shinyapps package, not from your code. There are references to "rep_len" within shinyapps, and therefore (at the moment) it won't work with R versions of lower than 3.0.0. Would it be possible for you to upgrade your version of R? We are evaluating what the minimum supported version of R should be, and it is good to hear from you and others if there is any strong reason to stay with R 2.15.x.

Best,

Fereshteh

[Nicholas Mader]

Hi Fereshteh,

All of my local instances of R are upgraded to version 3+; where I'm stuck is developing my shiny app on RStudio's Spark server which seems still to be running R 2.15.3. Here is a related thread, where several other RStudio staff are responding to a user's question about server updates: https://groups.google.com/forum/#!topic/shiny-discuss/Ve9YBbl99iQ.

Any additional thoughts on how to work with the shinyapps package on that server, or suggestions on where else to try developing the code?

Nick

[Nate Gilbraith]

Fereshteh,

That fixed it.  I don't have any reason why you keep shinyapps functional with previous versions of R (unless you feel like catering to the oblivious R users like myself).  I would recommend including text in the documentation or error message that R 3.0.0 is the minimum version necessary to use shinyapps successfully.

Thanks again for the help!

Nate

[Fereshteh Karimeddini]

Hi Nicholas,

As it was mentioned in that thread, there is no plan to upgrade version of R on spark server. Since you are using shinyapps.io, isn't that a better platform for you and your applications? What are your reasons for still needing spark? This is just to understand your needs, and be able to better help you.

Best,

Fereshteh

[Fereshteh Karimeddini]

Nate,

Thanks for the update. Good to hear that your issue is resolved. If we decide to require minimum  3.0.0, we will add necessary code (and documentation) to prevent users from deploying with wrong versions of R. Thanks for the suggestion.

Best,

Fereshteh

[Nicholas Mader]

Hi Fereshteh,

What I have learned in the last day or so is the fact that I really do have no need to develop apps on Spark. I simply had not realized that I could develop locally (where I have R version 3 installed) and deploy to shinyapps.io directly. Problem solved, and I'm the happy owner of a brand new app.

Thanks very much for helping provide guidance on this!

Nick

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[Fereshteh Karimeddini]

Nicholas,

Good to hear that you have been successful deploying your app to shinyapps.io, and it is working for you. Let us know if any other issues come up.

Best,

Fereshteh