Prism 5 and 6 bug: Lines connecting subcolumns disappear

If you enter replicate values into side-by-side subcolumns on an XY table. you can plot the graph with a separate line connecting each subcolumn. To do this, double click on the graph to bring up Format Graph, choose "Each replicate" for appearance, check the option to show connecting lines and also check the option to have one line for each subcolumn. 

The bug is that these lines can disappear when you leave the graph and then come back. To bring them back temporarily, double click on the graph to bring up Format Graph , then immediately click OK. 

A better fix is to save the file in .PZFX format, then close it and reopen . That seems to solve it. 

This is a problem with Windows only, not Mac.

We'll fix in 6.01.