Some other points:

A) I have seen these kinds of warnings in RStudio related to Rmd files. Try 
running your script in R rather than using RStudio, at least to identify where 
the problem is. If they are being generated by RStudio then you need to get 
help through their recommended forum.

B) Check for and remove any ".RData" file in your working directory when you 
start R. That is, if there is no text before the period in that file name it 
will get loaded automatically when you start R and any problems that were saved 
into it will be restored into your global environment. I recommend deleting 
such files, or at least renaming it so it won't get automatically reloaded.

C) Your assertion that the script is complete are only as trustworthy as 
allowed by your skills to confirm that. Pardon us if we reserve judgement on 
that point until the problem is isolated.

On February 25, 2019 12:45:37 PM PST, jlu...@ria.buffalo.edu wrote:
>The script is complete.  When I start, the environment is empty. 
>The warnings are issued for these "ghost" variables well before they
>are 
>created later in the script. 
>Somehow previous incarnations are lingering around and being unhappy
>even 
>after they were "deleted". 
>Jeff Newmiller has suggested a solution I have yet to try.
>
>
>
>
>William Dunlap <wdun...@tibco.com> 
>02/25/2019 02:30 PM
>
>To
>jlu...@ria.buffalo.edu, 
>cc
>r-help mailing list <r-help@r-project.org>
>Subject
>Re: [R] Ghost variables
>
>
>
>
>
>
>Doesn't that mean that your script is incomplete, that it needs to make
>
>those variables?
>
>Bill Dunlap
>TIBCO Software
>wdunlap tibco.com
>
>
>On Mon, Feb 25, 2019 at 10:32 AM <jlu...@ria.buffalo.edu> wrote:
>Fellow R-gonauts:
>
>I frequently erase/remove all the objects in my current environment so
>can 
>
>I re-run scripts to ensure that analyses are complete, error-free, and 
>accurate. 
>However, sometimes when I re-rerun a script I get warning messages (see
>
>below for example)  regarding some variables (objects) when these 
>variables do not exist in my current environment. 
>These ghost variables had existed at one time, but were subsequently 
>removed by the rm(list=ls()) command or by the broom icon in RStudio. 
>
>What's happening and how do I exorcise the ghosts?
>
>
>Warning messages:
>1: Unknown or uninitialised column: 'K'. 
>2: Unknown or uninitialised column: 'NDAfit'. 
>3: Unknown or uninitialised column: 'NDAfit'. 
>4: Unknown or uninitialised column: 'NDAfit'. 
>5: Unknown or uninitialised column: 'NDAfit'. 
>6: Unknown or uninitialised column: 'NDAfit'. 
>7: Unknown or uninitialised column: 'NDAobs'.
>
>Joe Lucke
>        [[alternative HTML version deleted]]
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide 
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
>
>       [[alternative HTML version deleted]]
>
>______________________________________________
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.

-- 
Sent from my phone. Please excuse my brevity.

______________________________________________
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