How do I check to see if the ZIP file is complete?

How do I check to see if the ZIP file is complete?

If the downloaded file ends in .download (Safari) or .part (Firefox) or .crdownload  (Edge/Chrome) then the file is either still downloading (and you need to be patient whilst it completes the download) or incomplete, if the download has stopped/crashed or you have had a Network Error (this indicates a partial download) and the file you have will not work. It often won't UNZIP as it isn't all there, and if it does then some (or all) of the files inside it are incomplete/truncated.

When you download a ZIP file, the very last part of it contains the filenames, sizes, checksums and other data. If the ZIP file is incomplete (Truncated) it often won't UNZIP, or if it does the contents may be truncated or partially missing.

VERY IMPORTANT: If the ZIP file reports an error or won't unzip, do NOT use another tool to repair or force unzip the files, as they almost certainly WILL BE incomplete and if you then move the truncated/incomplete map file to your device (or card) it won't work, and in the worst case scenarios you may get stuck in a boot loop (this is the same for ALL map files regardless of where you get them from, including from Garmin).

To confirm that a ZIP file is complete and the contents are valid, you can do a number of tests.

To do this if you unzip the ZIP file downloaded, it should contain more than a single file (usually 3 or 4 files).

If it only contains one file, then the download is incomplete and you will need to download the file again, making sure that you follow the guidance here!

If you want to run a test on the downloaded ZIP file, please follow the guidance below (for the relevant ZIP tool/application):


7Zip

If you are using 7Zip, you can Test the archive to see if it is complete and valid (just click on the 'Test' icon when the ZIP is open in 7Zip), see below.

You will see the results of the test, like below:

If it says there are no errors, then the ZIP file (and its contents) are complete (valid), if it says there are errors, then it is incomplete.

 

WinZip
You can do the same with WinZip (Unzip, Diagnostics),

You will see the results of the test, like below:

If it says there are no errors, then the ZIP file (and its contents) are complete (valid), if it says there are errors, then it is incomplete.

 

WinRAR
You can do the same with WinRar (Test).

You will see the results of the test, like below:

If it says there are no errors, then the ZIP file (and its contents) are complete (valid), if it says there are errors, then it is incomplete.

There are many other ZIP handling applications, but these are the most common ones. If you are using a Mac, Finder will normally automatically UNZIP the downloaded ZIP file; either after it has downloaded, or when you double-click on it.