I'm currently testing Crystal for the company I work for and everything is working great except for one thing.  When I run a chart for my data I do the following....

Chart type - Numeric Axis

Data - On change of  - Sample Date, Show Values - Chemical Concentrations

When the data runs everything looks great except when the dates don't match up.  Then I get a break in the line.  I tried adding a trend line by right clicking on the broken line, selecting Trendlines...., then choosing every single one to see if it can help.  I was very excited to see Connected lines but that did nothing for me.  Unfortunately my company is very anal about this and need one single line with know breaks.  This will make or break us using Crystal which I love because it saves me so much time and I have a lot of knowledge invested in it.  Thank you fo your time.