I am having a very strange behavior. I have a VI that contains a graph with 11 pens. One pen is on a second scale. When I print this front panel the line on the graph for the 11th pen is inverted. the scales have not changed. I have tried to create a new vi and it worked once until I saved the vi. I have tried 3 different drivers and they all do the same thing. I used the same code before without any problem on another project. I also tried using the report building method which worked but the graph turned out small and distorted on the file. I am running version 17 on windows 10 pro. I am running out of ideas.

Your right Y axis is Log-scale. Your first data point is exactly zero. Apparently, Labview have issues with displaying zero on log-scale. If you change your first data point of first (not 11th) plot to something like 1e-20, for example, then it prints correctly. As for obsolescence - LV2018 obsoleted "standard report" report type which is used for simple printing VI. I have always found Reports to be a bad fit for printing front panels. It messes up scales sometimes. If you want to just send front panel to a default printer you can use attached snippet. If you want to use custom printer, you are probably better of using .net printing function. It is a bit more work but you can have a very precise control of scales and page parameters.

LabVIEW

Easy Print Front Panel VI changes Graph on PDF file

Solved!

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This is now working. The zero was really messing with the log scale.

Thank you for the help.

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LabVIEW

Easy Print Front Panel VI changes Graph on PDF file

Re: Easy Print Front Panel VI changes Graph on PDF file