Null Pointer Exception with IJ.getLuts

Posted by Alex-2 on Jun 21, 2018; 5:30pm
URL: http://imagej.273.s1.nabble.com/Null-Pointer-Exception-with-IJ-getLuts-tp5020833.html

Any thoughts?  User error, or something more fundamental?
The error :
Traceback (most recent call last):
  File "/Users/alex/Source/IdeaProjects/imageJTest/imageJTest.py", line 114, in <module>
    setupDialog(nTypes)
  File "/Users/alex/Source/IdeaProjects/imageJTest/imageJTest.py", line 37, in setupDialog
    lutList = IJ.getLuts()
    at ij.Menus.getImageJMenu(Menus.java:785)
    at ij.IJ.getLuts(IJ.java:2194)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
java.lang.NullPointerException: java.lang.NullPointerException


The code snippet:

from ij import IJ

def setupDialog(nTypes):
    # Get list of LUTs   
    lutList = IJ.getLuts()

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