Cannot launch QGis 3.0 - .dll error messages

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)
Original Redmine Issue: 18326
Affected QGIS version: 3.0.0
Redmine category:build/install

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At launch of QGis 3.0.0 I get the following 5 error messages - see attached screenshots. Neither re-installation nore changing the installation path solves the issue.

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• 2018-03-04 11_38_22-D__Temp_QGis3 Error_2018-03-04 11_37_23-D__Temp_QGis3 Error_2018-03-04 11_33_58-.jpg (Markus Urbscheit)
• 2018-03-04 11_37_23-D__Temp_QGis3 Error_2018-03-04 11_33_58-qgis-bin.exe - Einsprungpunkt nicht gefu.jpg (Markus Urbscheit)
• 2018-03-04 11_38_42-D__Temp_QGis3 Error_2018-03-04 11_38_22-D__Temp_QGis3 Error_2018-03-04 11_37_23-.jpg (Markus Urbscheit)
• 2018-03-04 11_39_04-D__Temp_QGis3 Error_2018-03-04 11_38_42-D__Temp_QGis3 Error_2018-03-04 11_38_22-.jpg (Markus Urbscheit)
• 2018-03-04 11_39_41-Error loading QGIS.jpg (Markus Urbscheit)

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Related issue(s): #26811 (duplicates), #26891 (duplicates)
Redmine related issue(s): 18980, 19061

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[qgib]

Author Name: Giovanni Manghi (@gioman)

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Likely a local issue. Have you tried on other machines?

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• status_id was changed from Open to Feedback
• crashes_corrupts_data was changed from 1 to 0

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)

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Thank you Giovanni - no, I do not have another machine. All earlier QGis versions never showed this problem. In case this is a local issue - how could I fix it? I still have 2.18 installed but since the error messages are about .dll's in specific QGis 3.0-paths this shouldn't matter.

[qgib]

Author Name: Bastian Weber (Bastian Weber)

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I have the same problem on Windows 10 1709.
We have the same error under 1703.
QGIS is installed via an automatic software installatoin system with user "System".
The installation parameter is "QGIS-OSGeo4W-3.0.0-3-Setup-x86_64.exe /S /NCRC".
The installation is finished as successful, but after the first start via a user with or without admin rights the error is that the dlls are corrupt.
If QGIS is installed manually there are no errors.

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)

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Thank you Bastian - how do I "install QGis manually"?

[qgib]

Author Name: Bastian Weber (Bastian Weber)

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Hello Markus

i normaly start QGIS-OSGeo4W-3.0.0-3-Setup-x86_64.exe on the pc and installed it over the setup. But we want to install QGIS on several computers at the same time. So we are confused why the error happened.

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)

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I also used the normal windows installer. The problem remains with the newest version 3.0.1. I cannot start/use QGIS 3.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Markus Urbscheit wrote:

I also used the normal windows installer. The problem remains with the newest version 3.0.1. I cannot start/use QGIS 3.

Check for DLLs in @%WINDIR%\system32@ that are also in QGIS' @path@ (esp. @%OSGEO4W_ROOT%\bin@ and @%OSGEO4W_ROOT%\apps\qt5\bin@). If there are any removing them will probably fix the issue (but might break the package that put them there).

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)

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"but might break the package that put them there" - sorry do not understand this. What is QT5? What other potential package are your talking about? Might this affect/break other programs than QGis that use these dll's or just previous versions of QGis? So essentially: what is the risk of doing this? Thanks in advance for explanation. But this cannot be a long term solution for normal unexperienced users - digging out and deleting files deep in the system... There must be an automized mechanism to solve this in the long term, otherwise people will just feel helpless and stay with version 2.18.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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Markus Urbscheit wrote:

"but might break the package that put them there" - sorry do not understand this. What is QT5?

The toolkit we use

What other potential package are your talking about?

No idea. It shouldn't have put the DLLs there in the first place.

Might this affect/break other programs than QGis that use these dll's or just previous versions of QGis?

It will only break other programs - those which expect their DLLs in @system32@. Unfortunately windows always prefers DLLs from @system32@ to over anything that is in @path@.

So essentially: what is the risk of doing this? Thanks in advance for explanation. But this cannot be a long term solution for normal unexperienced users - digging out and deleting files deep in the system... There must be an automized mechanism to solve this in the long term, otherwise people will just feel helpless and stay with version 2.18.

Feel free to suggest one.

[qgib]

Author Name: Markus Urbscheit (Markus Urbscheit)

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Thanks very much Jürgen for your quick reaction and help - I apreciate it! So it would be probably be quite safe to keep a backup of the dll's, try out and see if something happens to other programs. I'll do this later on when I have more time.

Have a great day

[qgib]

Author Name: BYRON BRAVO (BYRON BRAVO)

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Markus Urbscheit wrote:

Thanks very much Jürgen for your quick reaction and help - I apreciate it! So it would be probably be quite safe to keep a backup of the dll's, try out and see if something happens to other programs. I'll do this later on when I have more time.

Have a great day

please help us with a solution, possibly not have time, but I would be very grateful if you help me, otherwise I will have no choice but to stay with the 2.xx

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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BYRON BRAVO wrote:

please help us with a solution, possibly not have time, but I would be very grateful if you help me, otherwise I will have no choice but to stay with the 2.xx

Like? Did you find conflicting DLLs in system32?

[qgib]

Author Name: Giovanni Manghi (@gioman)

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Markus Urbscheit wrote:

"but might break the package that put them there" - sorry do not understand this. What is QT5? What other potential package are your talking about? Might this affect/break other programs than QGis that use these dll's or just previous versions of QGis?

yes, but those programs should not have placed any DLL in %WINDIR%\system32 in the first place (contributing the the well known "DLL Hell", that you are experiencing). Blame the others in this case, not QGIS.

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• resolution was changed from to no timely feedback
• status_id was changed from Feedback to Closed

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• duplicated was configured as QGis does not start up - only error messages #26811

[qgib]

Author Name: Jürgen Fischer (@jef-n)

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• duplicates was configured as QGis does not start up - please help! #26891