NoClassDefFoundError

Fragment of a discussion from Talk:ScalarR
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Please try with Java 8. Java 9 and successive versions like java 11 has incompatible changes which may be the root cause of ClassNoDefFound error

We recently moved to java 11, but it’s never tested for old robots.

Btw, are you using OpenJDK or orcale jdk?

Xor (talk)11:38, 27 August 2020

I use oracle jdk currently.

Dsekercioglu (talk)18:31, 30 August 2020