[R] Unexpected call to "require"

Gabor Grothendieck ggrothendieck at gmail.com
Wed May 5 21:19:25 CEST 2010

Its coming from the Hmisc startup.  For example, in a clean session (R
--vanilla) try this:


Replacing the above call with this will suppress it:


To track it down:


and then run your script and step through each line in the debugger
until you see the message and then enter:


to see where you are.

On Wed, May 5, 2010 at 2:31 PM, Dennis Fisher <fisher at plessthan.com> wrote:
> Colleagues
> I am executing a length script in R (20K lines).  At one point, it returns:
>> Loading required package: tcltk
>> Loading Tcl/Tk interface ... done
>> Loading required package: Hmisc
>> Loading required package: survival
>> Loading required package: stats
>> Loading required package: graphics
>> Loading required package: splines
>> Attaching package: 'Hmisc'
>>       The following object(s) are masked from package:survival :
>>        untangle.specials
>>       The following object(s) are masked from package:base :
>>        format.pval,
>>        round.POSIXt,
>>        trunc.POSIXt,
>>        units
>> Loading required package: R2HTML
> This is not a problem but I am curious as to the source of the message.
> The command "require" appears three times in my code, for chron, XML, and SASxport.  When I test each of these (e.g., require("chron")) in a new session of R, I don't receive the messages shown above.  But, the script does return that message.
> Does anyone recognize this specific message, i.e., what is triggering the messages?
> Thanks in advance.
> Dennis
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone: 1-866-PLessThan (1-866-753-7784)
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