Error : unable to start png() device - Rshiny

[Ashu123]

Hi All,

I am using latest version of R and RStudio and working on a project in which i have to implement various statistical and forecasting techniques with different plot as per the input from the user. Everything is on track except the plotting part. When I am trying to pass a object over ui from server ( r- Shiny) for some plot , I am getting the below error:-
"
Warning in pngfun(filename = filename, width = width, height = height, res = res, :
unable to allocate bitmap
Warning in pngfun(filename = filename, width = width, height = height, res = res, :
opening device failed
Warning: Error in pngfun: unable to start png() device
127: pngfun
126: startPNG
125: drawPlot
111: reactive:plotObj
95: drawReactive
82: origRenderFunc
81: output$lag_plot
1: runApp
"
and over a Application( web page ) , i am getting the below error:-
"unable to start png() device".

I would really appreciate if someone help me out.

Regards,
Arjun

[andresrcs]

Hi Ashu, welcome!

To help us help you, could you please prepare a repr oducible ex ample (reprex) illustrating your issue? Please have a look at this guide, to see how to create one for a shiny app

Shiny debugging and reprex guide

Shiny issues can be challenging to resolve relative to other problems with your code or statistical methods. Shiny apps are often large, complex projects with interacting files. When seeking help from others it is considered polite to: First, do your best to work through RStudio's debugging tools to diagnose your issue on your own. Often those shiny logs and tracebacks are useful to others trying to help out. Second, strive to minimize the effort required to replicate your issue. You can do this with a reproducible example ("reprex"). Shiny Debugging Errors in Shiny code can be difficult to track down. If you don't know where your problem is coming from, you can track it down with some o…