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Unable to open attachments before sending messages

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Susan30 -  
Hello, my messaging application is Thunderbird version 78.4.1 (32-bit), and for some time now I have been unable to open my attachments before sending the message (to check if it’s the correct attachment). When I go to Tools, I cannot do anything regarding attachments. Error message: "The attachment could not be opened because the associated auxiliary application does not exist. Change this association in your preferences."
Thank you for your help.
Best regards

Configuration: Windows / Firefox 82.0

4 answers

  1. Anonymous user
    Hello Susan30,

    - What type of attachment is it (the part after the dot in its name)?
    - Do you have an application on your computer that can open this type of attachment?
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    1. Susan30 Author
      Thank you for your help, the attachments are PDF or Excel files, yes I have the applications capable of opening these attachments. A few days ago it was working fine??
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      1. Anonymous user
        @Susan30 ,

        Without going into Tools, you normally just need to double-click on the attachment at the top right of the message to open it for verification.
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        1. Susan30 Author
          That's what I used to do before, but it didn't work anymore. I solved the issue by uninstalling and reinstalling Thunderbird. Thank you for your responses. Regards.
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