Are there blanks in your data range? Select the chart, go to Tools menu
Options Chart tab, and check Interpolated for how you want blank cells to
be treated.

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"martinson" wrote in message
...
I used this chart the last 2 years and it worked fine. This year, I made a
new chart based off the old chart and now the lines don't show up. The
markers are there, but the lines are not. Anyone else have this problem?
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martinson portland