Connected but cannot find printer

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Rob D

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Apr 13, 2021, 10:05:32 AM4/13/21
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Hello,

We have developed a web application that integrates QZ tray. For shipping label printing.

Everything works in my windows 10 machine (connects, finds the zebra printer, prints labels).

  My colleague in a different location and can get connected but when we try to find the printer it doesn’t find the zebra.  They have the same setup as I do; windows 10 and a Zebra GX420d.

Does anyone have any recommendations or settings changes that may allow the printer to be found?

Thanks,

Rob 

Rob D

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Apr 13, 2021, 10:06:52 AM4/13/21
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Pardon my typos ...

Tres Finocchiaro

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Apr 13, 2021, 11:29:11 AM4/13/21
to Rob D, qz-print
When you search for the printer are you looking for "ZDesigner" or "Zebra"?

Do you mind sharing some logs from the offending PC?  If they contain sensitive data, you can email directly to sup...@qz.io.

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Rob's Gmail

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Apr 13, 2021, 8:29:32 PM4/13/21
to Tres Finocchiaro, qz-print
We’re looking for ZDesigner.  The logs were empty according to my colleague. 

Thanks,
Rob

Tres Finocchiaro

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Apr 13, 2021, 11:32:58 PM4/13/21
to Rob's Gmail, qz-print
I've never seen empty logs.  Please do the following:

QZ Tray icon, Advanced, Diagnostics, Zip Logs To Desktop.




Tres Finocchiaro

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Apr 15, 2021, 12:08:34 PM4/15/21
to Rob's Gmail, qz-print
2021-04-13 09:02:54,193 [INFO] Connection closed: 1006 - Disconnected
2021-04-13 09:02:54,193 [INFO] Closing all communication channels for An anonymous request

This suggests that the user clicked "Block" and "Remember this decision", blocking all unsigned requests.

I see there's an odd error with SiteManager preventing the user from removing this block:
2021-04-13 09:30:06,038 [ERROR] Unable to parse certificate date
java.time.format.DateTimeParseException: Text 'Not Provided' could not be parsed at index 0
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at qz.auth.Certificate.loadCertificate(Unknown Source)
at qz.ui.SiteManagerDialog.readCertificates(Unknown Source)
at qz.ui.SiteManagerDialog.run(Unknown Source)
at java.base/java.lang.Thread.run(Thread.java:834)

So for now, please remove %appdata%\qz from this computer and try again.

2021-04-13 09:32:52,193 [DEBUG] Searching for PrintService matching zebra
2021-04-13 09:32:52,762 [DEBUG] Found 7 printers
2021-04-13 09:32:52,762 [WARN] Printer not found: zebra

I'm curious to know which printers are found when clicking "Find all printers".

> if the logs show the reason the GX420d was not being recognized. 

Usually Zebra uses the name "ZDesigner", not "zebra", so you may need to adjust your search criteria, or find all printers and loop over them for the best match.

I'm a bit curious how the DateTimeParseException is triggered.  It smells like a bug.  If you can provide the steps to reproduce this, we'd be very happy, we don't like bugs. :)

-Tres

On Thu, Apr 15, 2021 at 9:57 AM Rob's Gmail <rd7...@gmail.com> wrote:
Hi Tres,

Attached are the logs.  Also, I managed to get it working today by doing the following:

1. Remove Z Designer printer/drivers that were installed.
2. Downloaded the UPS zebra drivers from ups.com
3. Selected the ZP450-200 dpi printer since the GX420d is not listed (they are similar). 

Windows says  ZP450-200 printer and all is working fine.  

I am curious to know if the logs show the reason the GX420d was not being recognized. 

Thanks for your help and for QZ Tray.  I'm planning to go white label once we finish QAing our application. 

Rob




On Thu, Apr 15, 2021 at 8:31 AM Rob's Gmail <rd7...@gmail.com> wrote:
Will do, thanks Tres. I’ll be able to send in about 12 hours when that office is open.

Rob 

Tres Finocchiaro

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Apr 15, 2021, 12:23:33 PM4/15/21
to Rob's Gmail, qz-print
> I'm a bit curious how the DateTimeParseException is triggered.  It smells like a bug.  If you can provide the steps to reproduce this, we'd be very happy, we don't like bugs. :)

Found it, it's not a bug, just misleading.  Patched via https://github.com/qzind/tray/issues/786.



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