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

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

## 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'.

<img alt="Untitled design (23).png" src="https://mintcdn.com/moengage-user-guide/qldDXt06kEifTu5N/images/moengage_0df30d.png?fit=max&auto=format&n=qldDXt06kEifTu5N&q=85&s=cd30b832c467af0c98f1935e91a495a3" width="1600" height="255" data-path="images/moengage_0df30d.png" />

## 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.