## WeBWorK Problems

### Problem with R Integration Showing Plots

by Jimmy Risk -
Number of replies: 1

Hello,

I've been using R integration for quite some time with no issues.  I'm now trying to incorporate plots into my questions, but am getting an error.

For reference, here is the error I get using a library problem "/Library/UBC/STAT/STAT241_251/setAssignment-05/HW05-03.pg"

ERRORS from evaluating PG file:  Unrecognized response type:  at [PG]/lib/Rserve.pm line 26
Died within Carp::croak called at line 342 of /usr/lib64/perl5/vendor_perl/5.30.3/Statistics/R/IO/Rserve.pm
from within Statistics::R::IO::Rserve::_send_command called at line 234 of /usr/lib64/perl5/vendor_perl/5.30.3/Statistics/R/IO/Rserve.pm
from within Statistics::R::IO::Rserve::eval called at line 26 of [PG]/lib/Rserve.pm
from within Rserve::try_eval called at line 146 of [PG]/macros/RserveClient.pl
from within main::rserve_eval called at line 175 of [PG]/macros/RserveClient.pl
from within main::rserve_start_plot called at line 79 of (eval 8619)

### Warning messages

Processing of this PG problem was not completed. Probably because of a syntax error.The translator died prematurely and no PG warning messages were transmitted. at /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Problem.pm line 778.

Some tidbits:

• Questions using R without plots pose no issue (for example, /Library/UBC/STAT/STAT344/hw05/hw05_q02.pg'
• Copying a working example gives the exact same error I wrote above (https://webwork.maa.org/wiki/R_in_WeBWorK "Displaying R Graphics")

I'm confused because I've seen other similar errors, but nothing that is occurring only when there are plots.

Any thoughts?

Thanks so much!

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