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Will not open .tab file attachments

  • 4 replies
  • 1 has this problem
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  • Last reply by fischer9

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I am using TB 91.4.1 (64-bit) on a windows 10 system and I am unable to open file attachments that end in .tab. TB gives me the options to open, save, detach or delete. When I select open, nothing happens. The file icon is Notepad, which is the default windows app for .tab files. I am able to save the file and then open it from windows explorer it but I can not open it from within TB like I can .pdf, .png, .cvs, and many other file types.

I have tried closing TB and deleting the mimeTypes.rdf file as well as repairing the folder and it still will not open the .tab file.

I am using TB 91.4.1 (64-bit) on a windows 10 system and I am unable to open file attachments that end in .tab. TB gives me the options to open, save, detach or delete. When I select open, nothing happens. The file icon is Notepad, which is the default windows app for .tab files. I am able to save the file and then open it from windows explorer it but I can not open it from within TB like I can .pdf, .png, .cvs, and many other file types. I have tried closing TB and deleting the mimeTypes.rdf file as well as repairing the folder and it still will not open the .tab file.

Chosen solution

I did a test: exported an address book in tab delimited .tab format and attached it to a message. The source indicates the Content-Type: text/plain. When I Open the attachment, I get the attached picture, which makes sense with my default text editor. A content-type: application/octet-stream is probably part of the problem:

http://kb.mozillazine.org/Actions_for_attachment_file_types#application.2Foctet-stream

Note that I have the preference mail.strictly_mime set to true in Config. editor, which forces 7-bit (quoted-printable) format, which might make a difference. Also, try sending yourself a message with a .tab attachment from an account that encodes them with the correct content-type, as not all providers handle attachments the same way.

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All Replies (4)

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Try deleting handlers.json, the replacement for the obsolete mimeTypes.rdf.

Open the source (Ctrl+U) and look at the Content-type header for the attachment.

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The content-type is application/octet-stream; which should work. When I send myself, though TB, a tab delimited file, TB assigns the same content-type and TB does nothing when I try to open the file attachment.

Also, I deleted handlers.jason and it did not resolve the issue.

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Chosen Solution

I did a test: exported an address book in tab delimited .tab format and attached it to a message. The source indicates the Content-Type: text/plain. When I Open the attachment, I get the attached picture, which makes sense with my default text editor. A content-type: application/octet-stream is probably part of the problem:

http://kb.mozillazine.org/Actions_for_attachment_file_types#application.2Foctet-stream

Note that I have the preference mail.strictly_mime set to true in Config. editor, which forces 7-bit (quoted-printable) format, which might make a difference. Also, try sending yourself a message with a .tab attachment from an account that encodes them with the correct content-type, as not all providers handle attachments the same way.

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I must have been the content-type. Since its the output of a script that I wrote, I converted the output to csv and it opens properly.

Thanks for your help.

Modified by fischer9