What happens?
When importing PDF file for the registration of modulation information is displayed the message "File has no valid extension. Consider files of type pdf.".
Why is it happens?
The situation can occur for the following reasons:
1. The file being imported by the Add PDF option is not with the extension. PDF;
2. The installed PDF reader does not integrate with Internet Explorer.
How to resolve?
Solution 1: Import a file with a .pdf extension
1. Click the Add PDF button and select only files with the extension .pdf.
Solution 2: Configure the pdf reader to open files in the browser
1. Open the pdf reader program installed on the computer;
2. Access the menu File - Preferences - File Associations;
3. Check the Display PDF in Browser option;
4. If this option is not displayed, click Advanced and check Include browser when setting default PDF viewer;
5. Click Ok and restart this computer.
Solution 3: Download the new version of Foxit Reader
1. Download the new version of Foxit Reader and install it by requesting integration with browsers or install another PDF reader.