Hi, 

I have a code that attaches multiple files to a Case but encounter an issue with files that's 200KB and above.


Here's the code that reads multiple files and save it as an attachment to a Case.


for (var i = 0; i < files.length; i++){        
    //console.log('looping  file...' + files[i].file.name);
    (function(file) {
                     
        var reader = new FileReader();                                  
        reader.onload = function (e) {
            console.log('reader.onload ..' + file.name);
            var byte64 = reader.result.replace('data:', '').replace(/^.+,/, '');
            var Attachment = new sforce.SObject("Attachment");    
            Attachment.Name = file.name;                        
            Attachment.ContentType = file.type;
            Attachment.ParentID =  caseId;
            Attachment.Body =  byte64;    
            Attachment.IsPrivate = false;
             
            var insertResult = sforce.connection.create([Attachment]);
            //console.log("insertResult=" +insertResult);
            
        };            
                            
        reader.readAsDataURL(file);    
        
                
    })(files[i].file);     
}


I don't have any issue attaching 1 large file up to 25MB. But when I attached multiple files,  I can only attach up to 200KB. 
For example, I have 2 files.
File A - 186 KB and 
File B - 568 KB. 

There are times,  that I can attach 186KB and 568KB but most of the time, it's only File A that is successfully attached. The code skips File B.  I removed that code that creates the attachment and I notice that the console log -- console.log('reader.onload ..' + file.name); -- is printed. This was not printed when sforce.connection.create([Attachment]); is present.

Any idea on this?