When ever I change the choices in the R Shiny error occurs: ERROR: value 'NA' not found in choices Warning: attributes are not identical across measure variables; they will be dropped""

[sarvesh9111]

Whenever I try to run the app.R file and change the choices from the front end this error occurs:

"ERROR: value 'NA' not found in choices
Warning: attributes are not identical across measure variables;
they will be dropped"

though I am able to achieve the expected output Internally, this error causes a problem when I try to Deploy it in the R Shiny and the results are erroneous.

Kindly help me on the same.

[andresrcs]

We don't really have enough info to help you out. Could you ask this with a minimal REPRoducible EXample (reprex)? A reprex makes it much easier for others to understand your issue and figure out how to help.

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…