Migration from 6.0 to 7.0 Linux server

Hello everyone, I am migrating from 6.0 to 7.0 on linux machine. Here are the steps I have done so far:

• Create user called "ivy"
• Download and unzip the engine with the instructions provided in the documentation
• Set the autoConfig parameter to true with username and password to the db in serverconfig.xml
• Start the engine

While starting the engine I didnt get any error, but once i open the browser i have noticed two things:

• when i open the browser i can see the old applications and processes on the screen

• when I click on Admin a progress bar is appearing which is refreshing all the time without any succeed and in the logs i have this error:

  11:57:11.983 ERROR [....error.restricted] Error Dumper 'Eclipse' has thrown an unexpected exception java.lang.NullPointerException at ch.ivyteam.ivy.error.restricted.EclipseDumper.dump(EclipseDumper.java:39) at ch.ivyteam.ivy.error.restricted.ErrorReport.createErrorReport(ErrorReport.java:160) at ch.ivyteam.ivy.error.restricted.ErrorReport.createErrorReport(ErrorReport.java:128) at ch.ivyteam.ivy.application.restricted.EndUserErrorDetails.createEndUserErrorReport_aroundBody8(EndUserErrorDetails.java:115)

EDIT I see also this error message at the top of the log: The process model version '1' of process model 'Administration' of web application 'System' is currently unavailabl e because of maintenance.