I have this error in the log every few seconds

I am on PI version 3.0.6644.26753 HS4 4.2.18.0

HSCF.Communication.ScsServices.Communication.Messages.ScsRem oteException: Conversion from string "Error" to type 'Integer' is not valid. ---> System.InvalidCastException: Conversion from string "Error" to type 'Integer' is not valid. ---> System.FormatException: Input string was not in a correct format. at Microsoft.VisualBasic.CompilerServices.Conversions.ParseDoub le(String Value, NumberFormatInfo NumberFormat) at Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger (String Value) --- End of inner exception stack trace --- at Microsoft.VisualBasic.CompilerServices.Conversions.ToInteger (String Value) at Scheduler.Global_Utils.SaveVar_Real(String Name, Object obj) at Scheduler.hsapplication.SaveVar(String Name, Object obj) --- End of inner exception stack trace --- Server stack trace: Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessag e(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(Mess ageData& msgData, Int32 type) at HomeSeerAPI.IHSApplication.SaveVar(String Name, Object obj) at HSPI_ULTRALOG3.hspi_plugin.UpdateHomeSeerVariable(String strVariableName, String strVariableValue)