# Error - Cannot write or create file (file or disk is read-only)

## **Description**

The below error message appears upon attempt to open the PDF Converter .nsf file.

![](https://3331713008-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MlCAurE6RSGoCmtmAET%2F-MlFRs_6JesuW3Sq3SsX%2F-MlFRxW2g3V94DjC4GDK%2Fimage.png?alt=media\&token=d01a5389-1883-4aca-a24e-1df4ddb0a2f1)

## **Solution**

This problem occurs if you try to open the .nsf file from inside the .zip package file without extracting the file first. Therefore you should right-click on the **PdfConverter.zip** file, extract the .nsf file to desired location and then open it from there.