java.lang.NoClassDefFoundError: org/nd4j/linalg/api/complex/IComplexNumber

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

Expert tip

A few things cause this exception:
1) Check if you have all jars and if they're in the correct path.
2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.


you can change your scala version to 2.11.11

Solutions on the web

via GitHub by raver119
, 1 year ago
via GitHub by Gh0s7
, 1 year ago
java.lang.ClassNotFoundException: org.nd4j.linalg.api.complex.IComplexNumber
at java.lang.ClassLoader.loadClass(
at sun.misc.Launcher$AppClassLoader.loadClass(
at java.lang.ClassLoader.loadClass(
at org.deeplearning4j.models.embeddings.inmemory.InMemoryLookupTable$Builder.(
at org.deeplearning4j.models.sequencevectors.SequenceVectors$Builder.presetTables(
at org.deeplearning4j.models.word2vec.Word2Vec$
at mypackage.MyClass.myMethod(

Users with the same issue

2 times, 23 hours ago
2 times, 1 day ago
29 times, 1 day ago
Once, 1 day ago
Once, 1 day ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.