Hi all, I just wanted to inform you, when I stumbled across the ref guide at https://lucene.apache.org/solr/guide/7_7/indexupgrader-tool.html I had problems to run the command on my Windows System
Instead of java -cp lucene-core-7.7.0.jar:lucene-backward-codecs-7.7.0.jar org.apache.lucene.index.IndexUpgrader [-delete-prior-commits] [-verbose] /path/to/index I had to write java -cp lucene-core-7.7.0.jar;lucene-backward-codecs-7.7.0.jar org.apache.lucene.index.IndexUpgrader [-delete-prior-commits] [-verbose] /path/to/index (instead of : use a ; to separate classpath entries) I found this information after research on the official documentation: https://docs.oracle.com/javase/8/docs/technotes/tools/windows/classpath.html#BEHJBHCD I don't know if that's specifically to Windows systems, but others might be happy, if an information regarding difference to MS Windows would be posted in the ref guide.
