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  • Sai Sri Ganapathineedi
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INVALID_TYPE_FOR_OPERATION, Only User, Contact, Lead, or Person objects are allowed for targetObjectId:

Want to access custom object field values in email template.
Here is what i did-
  
public static void sendCreationEmail(Service_Request__c srNew){
        string ldOwnerMail = srNew.Owner.Email;
        Messaging.SendEmailResult[] results;
        if(ldOwnerMail != null && ldOwnerMail != ''){
            Messaging.SingleEmailMessage message = new Messaging.SingleEmailMessage();
            message.setToAddresses(new String[] {ldOwnerMail});
            message.setTemplateId([select id from EmailTemplate where DeveloperName='Service_Request_Creation'].id);
            message.setSaveAsActivity(false);
            message.setWhatId(srNew.Id);
            message.setTreatTargetObjectAsRecipient(false);
            message.setTargetObjectId('01I6g000000shKzEAI');// Id of custom Object.
            
            results = Messaging.sendEmail(new Messaging.SingleEmailMessage[]{message});
        }
    }

Any Help on this ?