[Qgis-user] Unable to load project

Nicolas Cadieux nicolas.cadieux at archeotec.ca
Mon Jun 11 07:01:32 PDT 2018 

Hi,
Answers below.
Nicolas

> Le 11 juin 2018 à 04:40, DelazJ <delazj at gmail.com> a écrit :
> 
> Hi,
> 
> 2018-06-11 8:30 GMT+02:00 Springfield Harrison <stellargps at gmail.com>:
>> Hello All,
>> 
>> Thanks again for your insights, sorry for the delayed response.  Very helpful to get the different perspectives.
>> Yes, I understand the need for constant development and improvements.  And hence the need for some users to run multiple installations for comparative purposes.  I'm not in that league so only need something that works reliably.
Then I would go for the LTR 
>> Again, I understand the benefits of using a Linix installation but at this stage I'm not keen on managing more than one operating system.  In this realm, I would be considered an advanced amateur or lower-level expert in computer management and GIS so taking on major challenges is not something I would relish upon waking up each morning.
I agree. Pick your battles!  I have done the same for my PH.D.  When open source 99% but not for Windows.  That will be after.
>> Thanks for some clarity on to installation processes.  It would seem that for the most utility, osgeo4w would be the preferred choice.  It turns out that I had installed 2.8.1 as a standalone and am now running it successfully.  It would seem unlikely that I should fall back to 2.18?
2.18 is not a fall back.  It is a few years newer than 2.8x  

https://qgis.org/en/site/getinvolved/development/roadmap.html
>> Again, mixed signals here regarding versions, some advise 3.0, others 2.18, while I am succesfully using 2.8.1.  It would seem that 3.0 might be a good idea, would there be any obvious reason not to migrate?
Personally, I suggested you go to 3.0 to test to see if the problems you were having can from a broken QGIS installation.  The fact that the project did open in an older version of QGIS does indicate that this was the case.  As 3.0 can live without affecting 2.x so that looked like a good testing option.  Seeing you don’t enjoy playing around much with you versions, going for the latest LTR 2.18 looks like the better option.  If you do that, I would recommend you completely uninstall both versions of QGIS on your compter as bugs found in setting could be passed along the latest 2.18 version.  Do this when you have time.

 If you move to 3 this is not an issues. You should have a fresh install. I would wait the 10 days as suggested below and go to 3.2.

The only real reason not to migrate to 3.2 is If you have a number of specific plugins you absolutely need.  Some are not yet ported to QGIS 3. I could check for you if you send a list of your installed plugins.  Also, some gdal tool have missing parameters or options in 3.0. This may fixed in 3.2.  If you don’t know what I am talking about, or if you use gdal outside of QGIS, this is not an issus.

> 3.0 is end of life in 10 days, meaning that while you can still use it (like you do with 2.10), it won't get bug fixes anymore (and few months later, we would fall in the same issue).  3.2 will be released at that moment for 4 months, with new features but also probably new bugs. On the other hand 2.18 is there up to january 2019, had got a lot of fixes since almost two years and much much stable.
> And I still think that migrating from a so old 2.x release to 3.x might not be a good idea but I don't have technical skills to confirm or argument this feeling.
> If your need is to "simply" use QGIS and you don't want to regularly update, I'd say "Just go with LTRs". This is what they are designed for. You'll miss some features but will get them (stabler) once  the new LTR is released.
> 
> Regards,
> Harrissou
>> I see that Nicholas makes a good case for osgeo4w.
This install will give you options to install all GIS desktop packages an easy way.  Start with that. All the needed software will be installed but you will not have the options to select 2.x or 3.x.  You will be in 3.x.  Then run the install with the advanced option and have a look at how it works.  There, you could select extra software or packages.  If you are super nervous, install Teamviewer (google it) and I could help with the installation from my home.  I am on Montreal time.

>> Good advice about backing up data, which I generally do but not always as frequently as I should.  I do appreciate learning experiences but would prefer to choose those which are the more satisfying.  With my advancing years and very           full days, I try to pick experiences which advance my cause rather than just overcome bugs.  However, there is always value in learning.
>> Yes, I do appreciate the community support and find many problems are also dealt with in the world of Google.
>> Thanks again, all thoughts are much appreciated…
>> 
>> Cheers . . . . . Spring Harrison
>> 
>> 
>>> On 09-Jun-2018 05:31, Nicolas Cadieux wrote:
>>> Hi,
>>> Answers below
>>> 
>>> Le 9 juin 2018 à 02:06, Springfield Harrison <stellargps at gmail.com> a écrit :
>>> 
>>>> 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.
>>> 
>>> Ok but are having problems so things are 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 is the easy install and the OSGEO instal.  The latest will give you more choices, like installing many versions or additional packages.  You can also simply ask it to install all desktop package without having to ask yourself to many questions.  The only disadvantage is that it does not really provide a good mechanism for  uninstalling Qgis. You sometimes need to do it manually when things get complicated.  That is my preferred install method.  I think the easier Qgis install has a complete remove option usually found in windows.
>>>> 
>>>> Secondly, there seems to be no great consensus over the possibility (or not) of conflicts between simultaneous installations.  Again, this makes me nervous.
>>> 
>>> According to the Anita Grazer link I sent you, 2 and 3 store the settling and plugins in different places.  Anita is my guru.  If she said it was safe... it is safe!  But I also tried it and what she said is correct.  2 and 3 live together and do not interact but yes, the problem is real in many cases, just not this time.
>>>> 
>>>> Thirdly, why are some operators running two or three simultaneous installations?  Does this mean that the latest version is not adequate for some tasks?
>>> 
>>> Some  installs are  for stable long term support (LTS).  Some are under development (DEV). Qgis3,0 is what they call early adopters (so it is more likely to have bug but they have all the latest bling).  The nightly builds are version containing the most resent fixes.  Generally speaking, I go with the LTS at work and other versions at home.
>>>> 
>>>> 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.
>>> 
>>> Fix problems when you have time.  Plan for extra time.   Backup you data regularly so if shit hits the fan... you have a copy of all your files.  This is just common good sense computer user practice. Consider the problems you create and solve as a learning experience and not an obstacle.  Things get much less stressful if you know that you can only loose time and not your important data.  
>>>> 
>>>> 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.
>>> 
>>> Therefore your Qgis 2.10 is probably at fault and a update will more likely give you a more stable environment with better and newer features. Remember that opening a Qgis project from a higher version to a Lower version can lead to problems so make sure you add the Qgis version in the name of the file.
>>>> 
>>>> 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.
>>> 
>>> Things have probably improved since...  that is why and upgrade is justified. 
>>> 
>>>> 
>>>> Anyway, not sure if this is particularly helpful but is my current thinking on the upgrading process.
>>> 
>>> Well we see that this is not easy for you.  I sometimes feel the same sitting in front of a Mac where my reflexes are not as sharp as with windows.  Again, do it if when you have the time, consider this as a learning experience and not an obstacle.  Backup your data when doing something you are not sure of and use community support.
>>>> 
>>>> 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] 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:
>>>>>> 
>>>>>> QGIS 2.10.1, Windows 7.
>>>>>> Project starts to load, loads many layers . . .
>>>>>> halts loading "point Entity", a DXF file
>>>>>> the DXF file was renamed to trigger the Handle Bad Layers service
>>>>>> this was bypassed but project loading still fails to complete, cursor spinner on constantly
>>>>>> exiting with Save triggers "Unknown Exception"
>>>>>> the project file is trashed to 0kb
>>>>>> Exiting without Save is OK but no project can be loaded
>>>>>> Restoring previous project file versions yields the same results
>>>>>> 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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