Bars are missing lines on ends

Question:

When I print my schedule, the lines at the ends of the bars are missing. What could be causing this? I am using symbol shape #28 (blank symbol). On the screen the bars look fine.

Answer:

This is likely caused by the Force Background Color on Symbol/Text/Dates option.

Choose the Tools tab.
In the Program Options section, choose Dates:
Then, Force Background Color on Symbol/Text/Dates.