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# Adding filters - Invalid Attachment filter

With the Invalid Attachment filter it is possible to update a field of your database for those messages that were filtered because there was an error with its attachment file.

When sending attachments, DANAConnect allows you to add a filter to your communications to identify which of the attachment files were invalid.

To effectively use this filter you must follow these steps:

1. Enter the Conversation Manager   

![](https://storage.crisp.chat/users/helpdesk/website/20c17c74d739e400/1_8knrzh.png)

2. Access a conversation or create a new one  

![](https://storage.crisp.chat/users/helpdesk/website/20c17c74d739e400/2_12bmgbp.png)

3. Create a first node and second of your conversation   

![](https://storage.crisp.chat/users/helpdesk/website/20c17c74d739e400/3_4rjgox.png)

4. After these node are created click on the filter funnel and then you can configure the Error  filter in File Attachment

![](https://storage.crisp.chat/users/helpdesk/website/20c17c74d739e400/4_v2s20d.png)

5 . After you save the new filter the icon for the filter will change to a folder with a red alert icon. Then you can continue with the following steps of your communication that will happen only in the case there is an error with the attachment.


![](https://storage.crisp.chat/users/helpdesk/website/20c17c74d739e400/5_656wuq.png)