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# OK button
# Rerun the installer
== Error UnsupportedClassVersionError when running TVCli ==
The '''UnsupportedClassVersionError''' happens because the Java version in use is no the correct.
The Java used during TVCli execution is indicated by Windows [https://en.wikipedia.org/wiki/PATH_(variable)#DOS,_OS/2,_and_Windows ''PATH''] variable.
To determine witch version of Java is pointed by PATH variable you can use the ''--version'' JAVA parameter, we will show you bellow.
# Open [https://en.wikipedia.org/wiki/Windows_Console Windows Command Console]
# Execute java asking for his version => ''java --version''
== More doubts ? == <!--T:23-->