> ## Documentation Index
> Fetch the complete documentation index at: https://moengage.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Why Does Parsing Jinja Template Format in the Personalization Preview Fail?

> Resolve the Jinja template parsing error in MoEngage personalization preview. Usually caused by string operators on integers or incorrect quote usage.

## Problem

When attempting to use the personalization preview with an incorrect Jinja template format, the following error is displayed:

Error in parsing jinja template format. Error expected token ',', got 'integer'.

![Untitled design (23).png](https://mintcdn.com/moengage/OQ0V9ibjQLpsyCSD/images/moengage_0df30d.png?fit=max\&auto=format\&n=OQ0V9ibjQLpsyCSD\&q=85\&s=ab0d28e2fb9a53f9f1385c9cf4e2aa20)

## Solution

This error occurs for the following reasons:

1. String operators are applied to the integer data type values in the Jinja code.
2. When creating a campaign, a double quotation mark is used instead of two single quotation marks in the Jinja code.


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