Hi,
my trigger is not showing error while saving  but it is dhowing error while creating new contact.I am not able to figure it out.
My requirement for trigger are:
I have one custom setting for fee structure,I have to get total fee in contact from custom setting by matching 'course__c','semester__c', 'program__c' and 'batch__c'.In contact 'course__c' and 'Program__c' are lookup fields but these fields are text data type in custom setting.On basis of matching these fields,i have to populate 'total_fee__c' in contact with custom setting field named as'total_fee__c'.
I have done with trigger.Please help me to resolve the issues.
Below is my trigger code:

//updated trigger for fee update in contact-------------->>

trigger updateFee1 on Contact (before insert, before update){
    //Get all values of custom setting in a map(Assuming that Semester is Key and Fee is value in custom setting)
    Set<String> semester=new Set<String>();
    List<Contact> course=new List<Contact>();
    Set<String> batch=new Set<String>();
    //List<Contact> program=new List<Contact>();
    course=[Select id,Courses__r.Name,Program__r.Name from Contact where id IN : Trigger.new];
    
    System.Debug('###' +course);
    for(Contact c:Trigger.new)
    {
    if(c.Term__c!=null)
    {
    semester.add(c.Term__c);
    }
    //if(c.Courses__c!=null){
    //course.add(c.Courses__c);
    //System.Debug('@@@' + course);
    //}
    if(c.Batch__c!=null){
    batch.add(c.Batch__c);
    }
    }
    //for(Id i : course){
    //String name=i.Name;
    //coursename.add(name);
    //}
     //If (semester != null &&  course[0].Courses__r.Name != null && course[0].Program__r.Name != null && batch != null){
    List<Fee_Structure__c> fee=[Select Course__c,Term__c,Batch__c,Total__c from Fee_Structure__c where Term__c IN : semester AND Course__c = : course[0].Courses__r.Name AND Batch__c IN : batch And Program__c =: course[0].Program__r.Name ];
   Map<String, Fee_Structure__c> mapfee = new Map<String, Fee_Structure__c> ();
    
    
    for(Fee_Structure__c f : fee){      
    mapfee.put(f.Term__c,f);
    }
    for(Contact c:Trigger.new){  
     if(c.Term__c!=null){
     Fee_Structure__c fees=mapfee.get(c.Term__C);
     if(fees!=null){
     c.Total_Fee_To_Be_Paid__c=fees.Total__c;
    }
    }
}
}

Hi,
my trigger is not showing error while saving  but it is dhowing error while creating new contact.I am not able to figure it out.
My requirement for trigger are:
I have one custom setting for fee structure,I have to get total fee in contact from custom setting by matching 'course__c','semester__c', 'program__c' and 'batch__c'.In contact 'course__c' and 'Program__c' are lookup fields but these fields are text data type in custom setting.On basis of matching these fields,i have to populate 'total_fee__c' in contact with custom setting field named as'total_fee__c'.
I have done with trigger.Please help me to resolve the issues.
Below is my trigger code:

//updated trigger for fee update in contact-------------->>

trigger updateFee1 on Contact (before insert, before update){
    //Get all values of custom setting in a map(Assuming that Semester is Key and Fee is value in custom setting)
    Set<String> semester=new Set<String>();
    List<Contact> course=new List<Contact>();
    Set<String> batch=new Set<String>();
    //List<Contact> program=new List<Contact>();
    course=[Select id,Courses__r.Name,Program__r.Name from Contact where id IN : Trigger.new];
    
    System.Debug('###' +course);
    for(Contact c:Trigger.new)
    {
    if(c.Term__c!=null)
    {
    semester.add(c.Term__c);
    }
    //if(c.Courses__c!=null){
    //course.add(c.Courses__c);
    //System.Debug('@@@' + course);
    //}
    if(c.Batch__c!=null){
    batch.add(c.Batch__c);
    }
    }
    //for(Id i : course){
    //String name=i.Name;
    //coursename.add(name);
    //}
     //If (semester != null &&  course[0].Courses__r.Name != null && course[0].Program__r.Name != null && batch != null){
    List<Fee_Structure__c> fee=[Select Course__c,Term__c,Batch__c,Total__c from Fee_Structure__c where Term__c IN : semester AND Course__c = : course[0].Courses__r.Name AND Batch__c IN : batch And Program__c =: course[0].Program__r.Name ];
   Map<String, Fee_Structure__c> mapfee = new Map<String, Fee_Structure__c> ();
    
    
    for(Fee_Structure__c f : fee){      
    mapfee.put(f.Term__c,f);
    }
    for(Contact c:Trigger.new){  
     if(c.Term__c!=null){
     Fee_Structure__c fees=mapfee.get(c.Term__C);
     if(fees!=null){
     c.Total_Fee_To_Be_Paid__c=fees.Total__c;
    }
    }
}
}