Tom, While different versions of R do have subtle differences that can cause undesired behavior of the RExpression actor, I actually think it's not that esoteric of an issue that you're encountering. I've tried running the 00-StatisticalSummary.xml workflow with Kepler 1.0 and R 2.10.1 in the PATH on my system and it worked just fine. Can you verify that R is indeed on your PATH? Thanks, -ben
On Mar 30, 2010, at 2:22 PM, Matt Jones wrote: > Hi Tom, > > Kepler 2.0.0 is being prepared for release, and is going through > testing. For that purpose, we are developing a series of release > candidates. These will not be supported after 2.0.0 comes out, but > any issues you find with them would be valuable to report to kepler- > dev to improve the quality of the release. Discussion of the new > release occurs on kepler-dev rather than kepler-users. > > For 1.0.0, the reason that you are probably having trouble is your R > version. Kepler 1.0.0 shipped with an earlier version of R (2.6.2), > and the R actor was fairly sensitive to the particular version used > (because different R versions serialize their output differently). > I believe that Ben has upgraded to R 2.10 for the 2.0.0 release > series (hopefully he'll confirm), which is why things probably work > now for you. This is just a guess on my part, but likely is related > to the problem. If you want 1.0.0 to work, install a parallel copy > of the old version of R and put it first on your path and I'll bet > Kepler 1.0.0's R functionality will work for you again. > > Matt > > On Tue, Mar 30, 2010 at 1:05 PM, Tom Wainwright <Thomas.Wainwright at > noaa.gov > > wrote: > Hi, > > I have been trying to use Kepler 1.0.0 to organize some complicated > R-based analyses, and have run into some problems. In particular, > the "getting-started" example "00-StatisticalSummary.xml" produces > no output, and results in NullPointerException errors in the > RExpression class. (It worked last year, but not now--I am > currently running Fedora-11 x86_64 Linux, with R version 2.10.1 and > java version "1.6.0_17" OpenJDK.) > > Poking about, I found Kepler-2.0-RC1 on http://dist.kepler-project.org/dist > . I downloaded and ran it, and my problem seems to be fixed. > > I haven't seen any public announcement about availability of the > RC. Is this something that is useable at this point? For learning > and early development, should I go ahead and use it, assuming bugs > will be fixed in the near future? > > Thanks! > > -- > Tom Wainwright > NOAA Northwest Fisheries Science Center > ~ > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > The contents of this message are mine personally and do not > necessarily > reflect any position of the Government or the National Oceanic and > Atmospheric Administration. > ~ > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > _______________________________________________ > Kepler-users mailing list > Kepler-users at kepler-project.org > http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users > > _______________________________________________ > Kepler-users mailing list > Kepler-users at kepler-project.org > http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users
