gistfile1.txt

Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: There are errors in a score DRL:
Error Messages:
Message [id=1, kieBase=defaultKieBase, level=ERROR, path=org/optaplanner/examples/cheaptime/solver/cheapTimeScoreRules.drl, line=-1, column=0
   text=Unable to Analyse Expression period > $lastActivePeriod:
[Error: Comparison operation requires compatible types. Found int and interface java.lang.Comparable]
[Near : {... period > $lastActivePeriod ....}]
                      ^]
                      
                      
This error message doesn't distingish between the 2 sides (left and right, input and output, up and down):                      
   [Error: Comparison operation requires compatible types. Found int and interface java.lang.Comparable]
Should be:
   [Error: Comparison operation requires compatible types. Expected int but found interface java.lang.Comparable]