Question 1 Replies 90 Views × Close popover Srivani Masanigudem (SrivaniM5306) Accenture Team Leader Accenture IN View Profile Send Message SrivaniM5306 Member since 2015 1 post Accenture Posted: January 12, 2018 Last activity: January 12, 2018 Posted: 12 Jan 2018 6:42 EST Last activity: 12 Jan 2018 9:57 EST Closed Getting error while running migrate.sh file - part of upgrade from 6.2 version to 7.3 As part of upgrade process from 6.2 to pega 7.3, below error is being faced while running migrate.sh file "java.lang.UnsupportedClassVersionError: Bad version number in .class file" Using Oracle version 11. What changes are to be taken care of to avoid or resolve this error. Thanks in advance System Administration Upgrades Share × Close popover Facebook Twitter Linkedin Email Copy Link Copied! Moderation Team has archived post, learn more × Close popover This thread is closed to future replies. Content and links will no longer be updated. If you have the same/similar Question, please write a new Question. Posted: 3 years ago Posted: 12 Jan 2018 9:57 EST × Close popover Laurence Brannigan (LaurenceB_GCS) PEGA Senior Software Solutions Engineer PEG GB View Profile Send Message LaurenceB_GCS PEGA replied to SrivaniM5306 It's a little difficult to tell without the context around the error. Which java version are you using here? Also, does this reference back to a line in the migrateSystem.xml (or another XML file)?