Can not install doBy

Every time I try to install the doBy package I receive this error  
message:


Warning in install.packages :
 error 1 in extracting from zip file
Warning in install.packages :
 cannot open compressed file 'mvtnorm/DESCRIPTION', probable reason  
'No
such file or directory'
Error in install.packages : cannot open the connection

Has anyone run into this problem?

Generally resolving installation problems requires more detail. The  
glaringly obvious question after seeing that error message would be,  
do you have `mvtnorm` installed?  But even if you do have it installed  
there would be many other questions that remain unanswered.

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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html

Where you will be provided with a request to include a variety of  
specifics.

and provide commented, minimal, self-contained, reproducible code.

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In this case the code would mean .... how, _exactly_ are you "trying  
to install" the package. On R-help brevity is not the "soul of wit"  
but rather the opposite.

David Winsemius, MD
West Hartford, CT