Getting Error saying : At least one referenced Activity Class Schema is invalid: 19 119

Hi,

I'm seeing bellow error in log file. does anyone come across this error and know what is 19 119 indicates :

com.appiancorp.kougar.driver.exceptions.Signal: At least one referenced Activity Class Schema is invalid: 19 119
          at com.appiancorp.kougar.driver.ipc.IpcConnection.get(IpcConnection.java:303)
          at com.appiancorp.kougar.driver.ipc.IpcConnection.call(IpcConnection.java:750)
          at com.appiancorp.kougar.driver.ipc.IpcConnection.call(IpcConnection.java:729)
          at com.appiancorp.kougar.driver.KougarConnection.call(KougarConnection.java:321)
          at com.appiancorp.kougar.driver.KougarConnection.call(KougarConnection.java:272)
          at com.appiancorp.kougar.driver.KougarConnection.call(KougarConnection.java:220)
          at com.appiancorp.kougar.mapper.Mapper.request(Mapper.java:63)
          at com.appiancorp.kougar.services.KougarServiceInvocationH...

OriginalPostID-267694