Custom managed properties with hit highlighting Issue.

Question

Hi All,
I have used this blog
 and implemented the hit highlighting as of now everything works well but some of the search term I am getting below errors. 
I have tried a lot to fix this but not success.  Please suggest if I am missing something.  
I am using the below code in item template.
 var title = Srch.U.getHighlightedProperty(id, ctx.CurrentItem, "Title");
            if ($isEmptyString(title)) {title = $htmlEncode(ctx.CurrentItem.Title)} 
            var Description = Srch.U.getHighlightedProperty(id, ctx.CurrentItem, "Description");
           if ($isEmptyString(Description)) {Description = $htmlEncode(ctx.CurrentItem.Description)} 
            if(ctx.CurrentItem.sourcename != null){  
                if (ctx.CurrentItem.sourcename.indexOf('Purchasing')!=-1 && ctx.CurrentItem.sourcename.indexOf('Expenses')!=-1 ){  
                    if(!$isEmptyString(Description)){
                        var Description1 = Description.match(/.{0,100}<strong[^>]*>(.*?)<\/strong>.{0,100}/g);  // Reg ex to get the data
                        if(!$isEmptyString(Description1)){ 
                            ctx.CurrentItem.HitHighlightedSummary = Description1; 
                        else{
                            ctx.CurrentItem.HitHighlightedSummary  =Description;
Thansk
Basant Pandey

Answer 1

Hi Vikas,
The recommendation is not to modify the out of box display templates.  Whenever new patch or service pack applied Microsoft can update those out of box display templates, then you modified version will be lost.
So, create a copy of the display template and make the changes as per your requirement.  Once created new display template you can map it with the required result type and query rules.  Please refer to the following article.
http://www.abelsolutions.com/totm/creating-customized-search-results-in-sharepoint-2013/
Please don't forget to mark it as answered, if your problem resolved or helpful.