[Qgis-user] Unable to load project

Sat Jun 9 05:05:52 PDT 2018

Hi,
Let me also try to answer some of the questions

2018-06-09 8:06 GMT+02:00 Springfield Harrison <stellargps at gmail.com>:

> Hello Responders,
>
> Thanks very much for your suggestions and comments.  Very helpful.
>
> I must say though that the last few comments have again underscored my
> nervousness about changing anything that isn't completely broken.
>
> Firstly, why are there two installation processes and what is the purpose
> of each?  This implies making a choice after learning about the benefits
> and disadvantages of each.  What are the criteria for choosing one over the
> other?  How long is the process of understanding the options?
>
> There are different installation processes because there are different GIS
users, with different needs:
- the standalone installer provides the version of QGIS you want with its
dependency. So it should be enough.
- QGIS being part of a large ecosystem of tools, it can be extended with
other software/libraries. The osgeo4w installer is a kind of open and free
market for those libraries, avoiding you browse the Internet to separately
download each package. So other than installing QGIS, you can install some
other softwares, either to couple with QGIS or just run them alongside. Not
all of us need that but some do.

You can install different versions of the standalone installer, placing
each QGIS version under something like C:\Program Files\QGIS 2.10 and
C:\Program Files\QGIS 2.18 (sorry if the paths are not correct because I do
not check with an install beforehand, but I guess you get the idea - each
version has its folder). They'll work smoothly in parallel in my
experience. Given that those are 2.x releases, they share some items such
as your plugin folder. This is neither a big issue. The only downside I can
see is if you update a plugin that is no longer compatible with the elder
version but it's neither unsolvable.

To avoid you downloading each standalone installer and go through each
install process, here comes the handy osgeo4w: it allows you to again
easily pick those versions in one place (actually provides only most recent
versions) and places the installation folders under dedicated sub folders
in C:\osgeo4w\...\... folder. One installer and folder to rule them all.
(btw the issue with plugins is the same here)

Secondly, there seems to be no great consensus over the possibility (or
> not) of conflicts between simultaneous installations.  Again, this makes me
> nervous.
>
> Sorry to read that. As said I'm not aware of issues related to
simultaneous installations so I'd be interested in feedback on the possible
conflicts that were evocated: what kind of issues are they? Some examples?

Thirdly, why are some operators running two or three simultaneous
> installations?  Does this mean that the latest version is not adequate for
> some tasks?
>
> Like any software QGIS can have bugs. Because of its 4-months release
rythm and to ensure that users and corporate users have the best experience
with QGIS, they opted to release LTR, that is a version maintained at least
one year. So the longer, the stabler given that each months a new update
with bug fixes is released. This is great for most of the users.
The counterparty of this is that there's no new features added, so you can
not use that amazing new feature (eg 3D, new algorithm, multi canvas
display, integrated help button, new layout...) you read about few days
ago. Damn!! Ooh.. Actually you can: just need to install next to your
current release the one you read about.

But it's not only about using new released features. It's also about
testing bug fixes  or new features before they land in a published version.
For example, QGIS 3.2 should be released in a couple of weeks and is
currently in its bug hunting process. There's then a need for users to run
the dev version to check whether the new feature works as expected, does
not break any other function that would have worked either in the LTR or
the current release (hence 3 versions n my case for example).

I'm not sure I read anything about Windows 7 not being supported by QGIS
but fact is that your QGIS version is too old and for the issues you could
encounter, there won't be fixes to them but there's a risk that even people
don't remember how to help you as things have changed a lot meanwhile.
Depending on the usage you have, you'll at some point need to upgrade and,
if I may, don't migrate to 3.0 from your 2.10. Risky imho, the internals
have changed a lot. Better target 2.18 as end version (it'll be maintained
until january 2019 according to
https://qgis.org/en/site/getinvolved/development/roadmap.html#release-schedule
which does not mean you should stop using it at that time ). I'd also
advise you to backup your project files before opening any in a recent
version as older QGIS versions can't reliably read files saved. But all
this paragraph requires you to be confident on the upgrade beforehand... ;)

Hope that I'd helped to clarify some of your concerns and brought you back
on the zen and optimistic road,

Regards,
Harrissou

All these things give me pause and discourage me from wading in to
> something that may have a lengthy learning curve and an unpredictable
> outcome.  In this case, the devil you know definitely seems to be a worthy
> rule of thumb.  At least, until it fails utterly.
>
> In that regard, I discovered that at some point I had installed 2.8.1 and,
> remarkably, it would load my ostensibly corrupt configuration file.  I
> appear to be back in business.
>
> However, this version still bogs down upon loading the various layers but
> does not fail after the delay.  There are about 100 layers, mostly vector.
>
> Anyway, not sure if this is particularly helpful but is my current
> thinking on the upgrading process.
>
> Thank you all again for your assistance…
>
> Cheers . . . . . Spring Harrison
>
>
>
> On 08-Jun-2018 06:25, DelazJ wrote:
>
> Hi,
>
> Years that I'm using the osgeo4w installer (advanced install) with three
> concurrent releases  minimum (ltr, current release, dev, and sometimes
> ltr-dev) and I can't recall on any issue I got due to this situation.
> And afaics there's nothing to be particularly careful of, it's just about
> click click click process and all got installed in the c:\osgeo4w64 folder.
>
> Just wanted to share my experience.
>
> Regards,
> Harrissou
>
>
> 2018-06-08 13:49 GMT+02:00 Philip Barlow <philipb at pembrokeshirecoast.
> org.uk>:
>
>> AFAIK if you install QGIS with the standalone installer that just puts
>> the application and everything it needs into a folder in program files. You
>> may encounter issues if you installed multiple versions with the osgeo4w
>> installer if you aren’t careful.
>>
>>
>>
>> *From:* Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] *On Behalf
>> Of *Patrick Dunford
>> *Sent:* 08 June 2018 11:01
>>
>> *To:* qgis-user ML
>> *Subject:* Re: [Qgis-user] Unable to load project
>>
>>
>>
>> That may be the case for the application. However, depending on the
>> installation, shared libraries may be overwritten when a new installation
>> is carried out and cause older software versions to stop working.
>>
>>
>>
>> On 08/06/18 20:11, Philip Barlow wrote:
>>
>> I am happily running 2.18.20, 3.0.3 and 3.1 (nightly builds) side by side
>> on Windows 10. 2.x and 3.x store their user settings and plugins in
>> different locations so there are no conflicts.
>>
>>
>>
>> Phil
>>
>>
>>
>> *From:* Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org
>> <qgis-user-bounces at lists.osgeo.org>] *On Behalf Of *Patrick Dunford
>> *Sent:* 08 June 2018 05:02
>> *To:* qgis-user ML
>> *Subject:* Re: [Qgis-user] Unable to load project
>>
>>
>>
>> The Windows version of Qgis allows you to run multiple versions on your
>> computer side by side. I personally haven't used the Windows version for
>> several years so I can't be sure if you will have any issues running 3.0
>> alongside your current version. I run many of the editions I have in
>> virtual machines. If your PC has 8 GB or more of memory, or if you have
>> access to another computer that can run Linux, then you can try it out in a
>> Linux virtual machine or physical computer environment without disturbing
>> your current installation.
>>
>>
>>
>> On 08/06/18 07:38, Springfield Harrison wrote:
>>
>> hello Patrick, thanks for your ideas. I will try the no plugins option.
>>
>> The program will run with no project loaded and it will run older project
>> files but has problems with newer ones for the same project.
>>
>> I can load an older project file and then add newer layers to it and
>> reconfigure them, Etc. This is very tedious but will amount to a recovery.
>> It is better than starting from scratch for sure. But will the same problem
>> reoccur?
>>
>> I have contemplated migrating to version 3 but I'm always leery of
>> upgrades of anything as they often bring problems with them. In this list I
>> notice many references to installation issues and things not running. 2.10
>> is a devil I know.
>>
>> can I expect any difficulties installing 3.0 +?
>>
>> Cheers . . . . .   Spring
>> Samsung Tab 4
>>
>> On Jun 7, 2018 1:30 AM, "Patrick Dunford" <enzedrailmaps at gmail.com>
>> wrote:
>>
>> Thre are a number of troubleshooting steps to try out
>>
>> 1. Start up qgis using the -noplugins switch or remove all installed
>> plugins or test removing one at a time.
>>
>> 2. Backup the config file and start with a new empty config.
>>
>> Qgis 2.10 is well out of support, is there any reason you can't migrate
>> to 3.0?
>>
>>
>>
>> On 07/06/18 18:28, Springfield Harrison wrote:
>>
>> hello Phil,
>>
>> I did open the project file in Word, 2033 pages, and found 13 instances
>> referring to the dxf file. Hard to say if anything was wrong there, nothing
>> obvious. At least to me. Some other research I did indicates that maybe
>> there is an authentication problem, not sure just what that boils down to.
>>
>> I don't think the dxf file is the problem. I renamed it and bypassed it
>> on the startup routine which the program accepted but it still seized up
>> with a spinning cursor. Some things still function, such as modifying the
>> properties of a layer , Etc. But the screen is blank and nothing can be
>> saved.
>>
>> For some time I have noticed that loading a project file bogs down for a
>> while and then would resume to completion. Now it bogs down and blows up.
>> The key message seems to be unknown exception.
>>
>> Some older project files do load successfully however...
>>
>> Cheers . . . . .   Spring
>> Samsung Tab 4
>>
>> On Jun 6, 2018 11:15 PM, "Phil Wyatt" <phil at wyatt-family.com> wrote:
>>
>> Can you open a copy of the previous project file in something like
>> notepad and see if anything obvious can be fixed and or removed in relation
>> to the DXF layer?
>>
>>
>>
>> *From:* Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] *On Behalf
>> Of *Springfield Harrison
>> *Sent:* Thursday, 7 June 2018 1:36 PM
>> *To:* qgis-user at lists.osgeo.org List
>> *Subject:* [Qgis-user] Unable to load project
>>
>>
>>
>> Hello All,
>>
>> Bad News.  I am unable to load a project that normally works with no
>> problems:
>>
>>    1. QGIS 2.10.1, Windows 7.
>>    2. Project starts to load, loads many layers . . .
>>    3. halts loading "point Entity", a DXF file
>>    4. the DXF file was renamed to trigger the Handle Bad Layers service
>>    5. this was bypassed but project loading still fails to complete,
>>    cursor spinner on constantly
>>    6. exiting with Save triggers "Unknown Exception"
>>    7. the project file is trashed to 0kb
>>    8. Exiting without Save is OK but no project can be loaded
>>    9. Restoring previous project file versions yields the same results
>>    10. Loading some other projects works but may have cursor spinner
>>
>> Any ideas what is going on here?  I have rebooted the computer.
>>
>> Thanks very much . . . .
>>
>>
>>
>> Cheers . . . . . Springfield Harrison
>>
>>
>>
>>
>>
>>
>>
>>
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