93ext- I got the same error when playing with the graph arranges. I believe I set low range of the frequency range setting to 0hz when the error started. Will check tonight when I get home to verify. Changed it to 5hz and the error was gone.Tried that too, all I get is the invalid floating point error anytime I click something, makes this frustrating :/
Welcome to the IXL family.:T
Good luck with the build!