R help - Apr 2023 - aborting the execution of a script...

Dear members,
                            I have a script which I source it interactively. I
have the following questions:


  1.  If there is an error in an expression, an error message is printed, but
the execution continues till the end of the script. I am sourcing with echo. Is
there any way to abort the execution when the first error occurs? This happens
with R CMD BATCH. If there is an error midway, an error message is printed in
the output file and the execution aborts. Is there a way to mimic this with
source()?
  2.  I am trying to abort the execution with ESC key, but again the same thing
happens: it aborts the current expression but continues on. How to abort an R
script with source()? I am using RStudio in windows.

Please help,

THanking you,
Yours sincerely,
AKSHAY M KULKARNI

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On 12/04/2023 7:03 a.m., akshay kulkarni wrote:
> Dear members,
>                              I have a script which I source it
interactively. I have the following questions:
> 
> 
>    1.  If there is an error in an expression, an error message is printed,
but the execution continues till the end of the script. I am sourcing with echo.
Is there any way to abort the execution when the first error occurs? This
happens with R CMD BATCH. If there is an error midway, an error message is
printed in the output file and the execution aborts. Is there a way to mimic
this with source()?
>    2.  I am trying to abort the execution with ESC key, but again the same
thing happens: it aborts the current expression but continues on. How to abort
an R script with source()? I am using RStudio in windows.
I don't see this behaviour.  If I put this in a script:

  print(1)
  stop("here")
  print(2)

then execution stops at the "stop" line if I use source(), or R CMD 
BATCH <file>, or in RStudio, Run or Source gives the same behaviour.  I 
think older versions of RStudio would have run all three lines using 
Run, but all the other methods have stopped at the stop() line.

Duncan Murdoch