Error in Analytics

Hi,
I upgraded our production server from Dhis 2.17 to 2.20 the upgrade was done with the necessary upgrade scripts and instructions .The upgrade was successful afterwards.

Just realized that there are no values in reports,even though there are values in data entry .i checked through the logs and found this analytics errors.
  • WARN 2015-11-30 00:27:18,288 Analytics validation failed: Program must be specified when tracker data elements are specified (DefaultQueryPlanner.java [tomcat-http-33])

  • ERROR 2015-11-30 00:27:18,288 Error while executing action (ExceptionInterceptor.java [tomcat-http-33])

org.hisp.dhis.common.IllegalQueryException: Program must be specified when tracker data elements are specified

Any Clarifications to the problems.I can’t run any reports for any dataset for any period.(NO VALUES)

Counting on your quick responds.

Thank You.