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Zip file will not decompress

I have a fairly new iMac/M1 with Monterey 12.2.1 that will not decompress a word processing file I have downloaded from Nota Bene. I have been able to load other apps since reformatting this computer, with the exception of Nota Bene.

A NB technician says he can download NB on his iMac/M1 computer and suspects the problem is with Apple.

What gives and how can I fix it?

With thanks,


Karl

iMac 24″, macOS 12.3

Posted on May 15, 2022 3:59 PM

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May 15, 2022 5:13 PM in response to D.I. Johnson

I go to the Nota Bene website and pick the appropriate download, click on it, and it swoops into my download file as a zip file. I wait. While I wait there is not the usual expanding bar tracking the progress of the download. After a couple or so minutes the download seems to abort, leaving me with the message: Unable to expand NB.13.0.35.zip into Downloads. Error -1- no such process.

This happens on both iMacs I own and on a Windows laptop (the app won’t work on a Windows computer, but it should still download).

I have suspected a corrupted NB file, but the NB technician doesn’t think so because he says he has downloaded the problematic (for me) file onto his own iMac (but I don’t yet know how recently he has done this). I have not had this problem downloading any of the other apps.

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May 15, 2022 5:30 PM in response to Bundesrepublik

An addendum to D.I. Johnson on the non-expanding zip file:

When I try to use Terminal to unzip the file, I get this message: “End-of-central-directory signature not found. Either this file is not a zip file, or it constitutes one disk of a multi-part archive. In the latter case the central directory and zip file comment will be found on the last disk(s) of this archive. unzip: cannot find zip file directory in one of /Users/[personal information]/Desktop/NB.13.0.35.zip.Zip, period.”

I have no idea about the significance of this message or how to handle it.


Karl

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May 15, 2022 6:46 PM in response to D.I. Johnson

I have already tried multiple browsers. What remains, I think, is to find out for certain whether the errant file is indeed corrupted (as I suspect) and when the NB technician last downloaded it, or whether he is willing to try again. He has seemed highly doubtful that the file is corrupted. I will ask him about a mirror download. He confesses to being stumped by this problem.

Thank you for your help,

Karl P.

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May 27, 2022 1:14 PM in response to Bundesrepublik

In response to the above problem, Nota Bene e-mailed me a download link (“mirror download”?) that worked. The original problem, however, remained in that I could not download the file from the NB website.

The problem was that the download would stall and abort before it could fully load, hence the inability to decompress.

What appears to have resolved the problem is a new modem and an upgraded internet package from my internet service provider, which dramatically increased the download speed from minutes to seconds. And I was able to download the reluctant file from the NB website.

I should add, however, that the technician at NB was not convinced that the above explanation was really the solution. In any case, the problem has gone away.

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Zip file will not decompress

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