Hello,

I'm getting an error when running a test on the follow piece of code... the underlined piece is where the error is coming from, any ideas on how to correct this?

System.DmlException: Update failed. First exception on row 0 with id a07c0000000fbUFAAY; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, Trade: execution of BeforeUpdate caused by: line 17, column 1: Illegal empty right operand for operator '<=' in query 'select COUNT(id), WhoId from Task '.: []

Set<Date> PStart = new Set<Date>();
    for(Transaction__c t:trigger.new)
        PStart.add(t.Trade_Period_Start__c);
        
    Set<Date> PEnd = new Set<Date>();
    for(Transaction__c t:trigger.new)
        PStart.add(t.Trade_Date__c);
        
    Set<Id> cid = new Set<Id>();
    for(Transaction__c t:trigger.new)
        cid.add(t.rep__c);

    Map<String,Integer> callCountMap = new Map<String,Integer>();
        for(AggregateResult r:[select COUNT(id), WhoId from Task where Whoid in :cid AND (Type = 'Cold Call' OR Type = 'Inbound Call' OR Type = 'Outbound Call') AND Status = 'Completed' AND isDeleted = False AND (Date_Completed__c >=: PStart AND Date_Completed__c <=: PEnd) GROUP BY WhoId LIMIT 100 ALL ROWS])
            callCountMap.put(String.valueof(r.get('WhoId')),Integer.valueof(r.get('expr0')));