I am running the latest version of IGVtools and have several .fa files loaded. I am now trying to locate a particular motif in these files. I start with Tools -> Find Motif, enter the sequence, the ...

java.lang.NullPointerException: cause at io.netty.util.internal.ObjectUtil.checkNotNull (ObjectUtil.java:33) ~ [netty-common-4.1.63.Final.jar:4.1.63.Final] at io ...

Ever come across the null pointer exception in Java? We explain what this error message means, why it happens, and how to avoid the billion-dollar mistake.