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<p>The original bug: <a class="moz-txt-link-freetext" href="https://github.com/qgis/QGIS/issues/29885">https://github.com/qgis/QGIS/issues/29885</a></p>
<p>The original fix: <a class="moz-txt-link-freetext" href="https://github.com/qgis/QGIS/pull/3034">https://github.com/qgis/QGIS/pull/3034</a></p>
<p>Excerpt from the bugfix:<br>
</p>
<h3 class="timeline-comment-header-text f5 text-normal"><strong
class="css-truncate expandable"> <a class="author text-inherit
css-truncate-target" data-hovercard-type="user"
data-hovercard-url="/hovercards?user_id=1192433"
data-octo-click="hovercard-link-click"
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href="https://github.com/rouault">rouault</a> </strong>
commented <a
href="https://github.com/qgis/QGIS/pull/3034#issuecomment-214999338"
id="issuecomment-214999338-permalink" class="timestamp
js-timestamp">on 27 Apr 2016</a></h3>
<h3 class="timeline-comment-header-text f5 text-normal">"Additional
precision for completness. The name of the PR is maybe a bit
misleading. It should read "concurrent opening". Modification in
MapInfo while a dataset is opened by QGIS is not possible. But
this was already the case with GDAL 1.X. But modification in QGIS
is possible and MapInfo will see the changes. MapInfo apparently
needs an exclusive access to the files to allow saving them.
Fixing that isn't in the immediate scope of interest and would
require both changes in GDAL and QGIS so that QGIS asks GDAL to
close file descriptors when it doesn't need access to the files."</h3>
<p>As I read this excerpt, it means that it's not possible for
MapInfo to update a tab-file while an instance QGIS is using it
whether it's for update or for read purposes. <br>
</p>
<p>I don't know if there is other bugfixes that has addressed this
issue.</p>
<p>I've been in the same situation a while back with an organisation
having 2000 - 3000 tab files. My solution was to put all data from
the tab files into a Postgres database and create tab files that
"pointed" to the new tables, and let both MapInfo and QGIS users
use the Postgres tables in stead. This was a long and exhausting
process but it - for once and all - solved the concurrency
problems.</p>
<p>It not the mechanical process to convert the tab-file to a table
that is the problem. That is a task that can be solved using ex.
ogr2ogr. The worst problem is deciding which version of each and
every tab file that is the most current and complete and choosing
this tab file for conversion to postgres.<br>
</p>
<p>Regards</p>
<p>Bo Victor Thomsen<br>
GIS & Database specialist<br>
AestasGIS Denmark<br>
</p>
<p><br>
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<div class="moz-cite-prefix">Den 25-06-2019 kl. 15:34 skrev Paul
Wittle:<br>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I believe there may already be a bug ticket
for this but I’ve found my deployment of QGIS is causing
MapInfo errors when opening MapInfo tab files. It happens when
you load the TAB file and also when you open the project and
it even happens when a TAB file is open but not rendering. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is a pretty major issue for people
that are looking at a migration as we are so we need to get
this one fixed asap. Does anyone know if there is a fix being
worked on or is funding required to get this one fixed asap?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Paul<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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