go to post Duong Do · May 8, 2020 Hi Michael, I think the classpath is correct since it contains 2 required jar files. I don't think it is because you Download Docker or connect to Cache instance. Furthermore, if it is only a warning and you are still able to run the code, it is OK. The issue you face I guess that you run the command in the wrong directory in the Learning Labs. Could you try to run these commands in your Lab? cd /home/project/quickstarts-multimodel-java/src javac -cp ".:../lib/intersystems-jdbc-3.0.0.jar:../lib/intersystems-xep-3.0.0.jar" multimodelQS.java java -cp ".:../lib/intersystems-xep-3.0.0.jar:../lib/intersystems-jdbc-3.0.0.jar" multimodelQS Thank you. If it does not help, in the ticket that you submit to Online Training, could you please attach a screenshot on what errors you encounter, and what commands that you used? Regards.