Hi, I got the below message when used SGPLOT with Series statement to create PK graph.  NOTE: The log axis cannot support zero or negative values for the axis from plot data or due to default or       assigned BASELINEINTERCEPT value. The axis type will be changed to LINEAR. it is not creating the y-axis in log scale.    Below is the code I used. proc sgplot data=pkmean dattrmap=test noborder ;    series x = pktime1 y =meancmax/ group=column attrid=X markers;    xaxis label = 'Time (hr)' values = (0 to 60 by 10) minor MINORCOUNT=1;    yaxis label = 'Concentration (ng/mL)' values = ( 1 10 100 1000 10000)  type=log logbase=10 logstyle=logexpand ;*   minor MINORCOUNT=8 ;    keylegend / title="Concentration Vs. Time" location=inside position=TOPRIGHT across=1 down=2 noborder; run;   Please let me know if you are aware of resolving this issue.   Thanks ... View more