Because learning needs, the installation of the lower version of jena2.6.4, higher version of the notebook is normal, but the low version environment configuration in the CMD running after the sparql command, shows the jena root not set, add jena_root environment configuration variable values changed back after the problem is still not solved, could you tell me the how to solve ah,

CodePudding user response:

Problem has been solved, version is low, the JENA_HOME related environment variables and path removed, and then add the environment variable JENAROOT, variable values for the jena stress path, the path: add % % JENAROOT bat, it's environment configuration was successful

CodePudding user response:

I also installed Jena3.1 before, now want to switch to 2.6, that need to be deleted

CodePudding user response:

Uh huh, I was deleted, if not completely deleted again