American Association of Variable Star Observers (AAVSO)
Fri, 09/01/2023 - 11:23

Sometimes when I work with the WWZ analysis it gives me an error, which says "java.lang.IllegalArgumentException: A positive range length is required" then it says the range is from the value I set to the minimum frequency, to the value I set to the minimum frequency (so the same value), even though I set different values for the minimum and maximum. I can't figure out what causes the error, I've tried changing each of the inputs individually to see what causes it and I'm still not sure. Can anyone explain what the source of this issue is?

Astronomical Society of South Australia (ASSAU)
Please provide example

To reproduce this, we need a few things:

  1. A data file or an AID object name and JD range
  2. Which series is being analysed (Visual, V, ...)
  3. The WWZ parameter dialog values with min/max frequency, frequency step, decay, time divisions

This may relate to a known bug or it could be something we don't know about.



American Association of Variable Star Observers (AAVSO)
Sorry for the late response…

Sorry for the late response. Attached is the data file:


For the series I just selected "unspecified".

I am only analyzing the data before day 2010 though, as the data afterwards has a large gap, so I created a simple filter and selected "filtered" for the analysis.

The parameters are:

min = 0.055

max = 0.065

step = 0.00001

decay = 0.01

time divisions = 50

I tried changing some of the parameters in different ways and still got the same error. If you're able to find the source of the error, please let me know.

Thank you