On Dec 18, 2007 9:39 PM, David Winsemius <dwinsemius at comcast.net> wrote:
"Armin Goralczyk" <agoralczyk at gmail.com> wrote in news:a695fbee0712180702k1a351b5cxca54d45b81096166 at mail.gmail.com:
It's not the spaces, the problem is the tag (sorry that I didn't
specify this), or maybe the string []. I am working on a Mac OS X 10.4
with R version 2.6. Is it maybe a string conversion problem? In the
following warning strings in the html adress seem to be different:
Fehler in .Call("RS_XML_ParseTree", as.character(file), handlers,
as.logical(ignoreBlanks), :
error in creating parser for
http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&ter
m=laryngeal neoplasms[mh]
I/O warning : failed to load external entity
"http%3A//eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi%3Fdb=pubme
d&term=laryngeal%20neoplasms%5Bmh%5D"
I do not have an up-to-date version of R on my Mac, since I have not yet upgraded to OSX10.4. I can try with my older version of R, but failure (or even success) with versions OSX-10.2/R-2.0 is not likely to be very informative. If you will post an example of the input that is resulting in the error, I can try it on my WinXP machine. If we cannot reproduce it there, then it may be more appropriate to take further questions to the Mac-R mailing list. The error message suggests to me that the fault lies in the connection phase of the task.
Example:
esearch <- function (term){
+ srch.stem <- "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?" + srch.mode <- "db=pubmed&retmax=10000&retmode=xml&term=" + doc <-xmlTreeParse(paste(srch.stem,srch.mode,term,sep=""),isURL = TRUE, + useInternalNodes = TRUE) + sapply(c("//Id"), xpathApply, doc = doc, fun = xmlValue) + }
term <- 'meyer' pmid <- esearch(term) #search successfull term <- 'meyer[au]' pmid <- esearch(term)
Fehler in .Call("RS_XML_ParseTree", as.character(file), handlers,
as.logical(ignoreBlanks), :
error in creating parser for
http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&retmax=10000&retmode=xml&term=meyer[au]
I/O warning : failed to load external entity "http%3A//eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi%3Fdb=pubmed&retmax=10000&retmode=xml&term=meyer%5Bau%5D"
Seems to be a Mac problem. I will post on the Mac-R mailing list. Thanks
Armin