Bob, As an aside, all the perl scripts should be run serverside, so it should hopefully be browser independent. The bombs are created during processing of the problem on the server, not as a return from the browser (unless it’s during the processing of a problem during a submission).
What LON-CAPA servers were the error messages from? Mark On May 29, 2015, at 1:01 PM, Rex Abert <abe...@tcc.fl.edu> wrote: > Bob- > > This might be a browser-specific phenomenon. One popular browser is known to > be non-compliant with W3C standards. One thing that *might* help is to > combine all your scripts into one script at the beginning of the problem. > The way it is written now, the variables $f1 and $ansa might not have values > assigned to them in the second script, since there values were set in a > different script---an issue with the scope of the variables. > > It would be interesting to ask your students which browser was in use when > the error occurred. > > Rex Abert > Associate Professor of Mathematics > Tallahassee Community College > ________________________________________ > From: lon-capa-users-boun...@mail.lon-capa.org > [lon-capa-users-boun...@mail.lon-capa.org] on behalf of Bob Gonzales > [rgon...@binghamton.edu] > Sent: Friday, May 29, 2015 12:21 PM > To: Discussion list for LON-CAPA users > Subject: Re: [LON-CAPA-users] Illegal division by zero > > Rex, > > Here's the code, I thought it might be easier to cut and paste it in > construction space to make it easier to debug. The problem works fine for me > in construction space. One student with $f1=1.0 and one student with > $f1=6.0221e23 have gotten it correct so far. > > <problem> > <part id="t06p12a"> > <script type="loncapa/perl"> > $n1=&random(0.025,0.050,0.001); > $t1=&random(1,2); > $unit1=&choose($t1,"moles","molecules"); > $f1=&choose($t1,1.00,6.0221e23); > $mw1=(12.011*20.0)+(1.008*24.0)+(15.999*2.0); > $ansa= $n1 * 1e-3 * $f1/ $mw1; > </script> > > <startouttext /> > <p>A particular oral contraceptive contains &format($n1,'3f') mg of ethinyl > estradiol > in each pill. The formula of this compound is <chem>C20H24O2</chem>. > How many $unit1 of ethinyl estradiol are there in one pill? (give answer to > 3 digits)</p> > <endouttext /> > <numericalresponse format="3e" answer="$ansa" id="11"> > <responseparam name="tol" type="tolerance" default="5%" > description="Numerical Tolerance" /> > <responseparam name="sig" type="int_range,0-16" default="3,4" > description="Significant Figures" /> > <textline /> > <hintgroup> > <startouttext /><endouttext /> > </hintgroup> > </numericalresponse> > </part> > <part id="t06p12b"> > <script type="loncapa/perl"> > $t2=&random(1,3); > $sub2=&choose($t2,"carbon","hydrogen","oxygen"); > $f2=&choose($t2,20.0,24.0,2.0); > $ansb=($ansa/$f1)* $f2 * 6.0221e23; > </script> > > <startouttext /> > <p>How many $sub2 atoms are there in one of these pills (due to the presence > of ethinyl estradiol)? (give answer to 3 digits)</p> > > <endouttext /> > <numericalresponse format="3e" answer="$ansb" id="12"> > <responseparam name="tol" type="tolerance" default="5%" > description="Numerical Tolerance" /> > <responseparam name="sig" type="int_range,0-16" default="3,4" > description="Significant Figures" /> > <textline /> > <hintgroup> > <startouttext /><endouttext /> > </hintgroup> > </numericalresponse> > </part> > > <part id="t06p12c"> > <script type="loncapa/perl"> > $mw3=&choose($t2,12.011,1.008,15.999); > $ansc=$ansb*$mw3/6.0221e23; > </script> > > <startouttext /> > <p>What mass of $sub2 is this? (Enter the answer in grams.)</p> > > <endouttext /> > <numericalresponse format="3e" answer="$ansc" id="13"> > <responseparam name="tol" type="tolerance" default="5%" > description="Numerical Tolerance" /> > <responseparam name="sig" type="int_range,0-16" default="3,4" > description="Significant Figures" /> > <textline /> > <hintgroup> > <startouttext /><endouttext /> > </hintgroup> > </numericalresponse> > </part> > </problem> > > > > _______________________________________________ > LON-CAPA-users mailing list > LON-CAPA-users@mail.lon-capa.org > http://mail.lon-capa.org/mailman/listinfo/lon-capa-users -- Mark Lucas email: luc...@ohiou.edu 252D Clippinger Lab phone: (740)597-2984 Department of Physics and Astronomy fax: (740)593-0433 Ohio University Athens, OH 45701 _______________________________________________ LON-CAPA-users mailing list LON-CAPA-users@mail.lon-capa.org http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
