handy tech braille driver crashed nvda #3709

nvaccessAuto opened this Issue Dec 10, 2013 · 9 comments

2 participants


Reported by bdorer on 2013-12-10 23:29
I've just connected my Handy Tech braille display to the computer through a USB2Com-Converter.
As I select the braille driver and press ok, nvda crashes without providing a log file.
Blocking #3213, #4456


Comment 1 by jteh on 2013-12-11 02:08
Several users have reported such issues on the mailing lists. This is related to the Handy Tech COM server, so it needs to be investigated and fixed by Handy Tech. Are you able to report this to Handy Tech? If you can, feel free to copy me on any emails. If not, I can start the conversation with my contact, but I'd need you or someone else experiencing the problem to take it further, since I don't own a Handy Tech display and can't help with the investigation.


Comment 2 by bdorer on 2013-12-11 09:22
I'll write to Handy Tech today and refer to this ticket.

Furthermore: If the display is connected and NVDA starts, I get the following message in German. I tryed to translate it in to english:

NVDA.exe - Error in Application
The instruction in "0x7e376779" refers to memory in "0x00000000". The process "read" wasn't possible on the memory.

Klick "OK" to cancel the programm.
Klick "cancel " to debug .

German Message:
NVDA.exe - Fehler in Anwendung
Die Anweisung in "0x7e376779" verweist auf Speicher in "0x00000000". Der Vorgang
"read" konnte nicht auf dem Speicher durchgeführt werden.

Klicken Sie auf "OK", um das Programm zu beenden.
Klicken Sie auf "Abbrechen", um das Programm zu debuggen.


Comment 3 by bdorer on 2014-02-04 23:11
Handytech provided me a dll which fixes the crash. I asked them to commit the debugged file in time for 2014.1.


Comment 4 by jteh on 2014-02-05 00:37
Unfortunately, this is very unlikely to make it into 2014.1, as there isn't sufficient time left for testing.


Comment 5 by jteh on 2014-09-08 09:59
Handy Tech just sent me the updated files.
Milestone changed from None to 2014.4


Comment 7 by James Teh <jamie@... on 2014-09-10 02:22
In [8a4607a]:
```CommitTicketReference repository="" revision="8a4607a413f78cdc691756c8805755914a30c4ba"
NVDA no longer crashes when attempting to use a Handy Tech braille display in some cases.

Re #3709.


Comment 8 by James Teh <jamie@... on 2014-09-10 02:26
In [290643e]:
```CommitTicketReference repository="" revision="290643e54f6fac30a854f1d79ac1285389d318ae"
Merge branch 't3709' into next

Incubates #3709.

Added labels: incubating

Comment 9 by jteh on 2014-09-10 10:32
It'd be great if anyone experiencing this can test a current next snapshot and confirm whether it is fixed there. Thanks.


Comment 11 by James Teh <jamie@... on 2014-10-08 00:35
In [688e8f8]:
```CommitTicketReference repository="" revision="688e8f8d5d96be2e502698004ab4343512b15936"
NVDA no longer crashes when attempting to use a Handy Tech braille display in some cases.

Fixes #3709.

Removed labels: incubating
State: closed
@jcsteh jcsteh was assigned by nvaccessAuto Nov 10, 2015
@nvaccessAuto nvaccessAuto added this to the 2014.4 milestone Nov 10, 2015
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