<div dir="ltr">Actually, your situation is rather uniquely terrible Lee, in that after running your "upgrade" you seem to have no copy of the postgis.so library left at all. So the hacks in my blog are not useful to you, as they assume that at lest there's a new/old copy of the so file lying around.<div><br></div><div>You'll need to get a copy of the so. You could hand-copy one out of a compatible linux distro, for example. Or you could grab the postgis source, download the dev packages for postgresql for your distro, and build one for yourself. Either option holds possibilities.</div><div><br></div><div>Another possibility if you have a compatible linux machine lying around: copy the whole postgresql data directory over and start it up over there. Requires identical architecture (32/64) and pgsql/postgis versions.</div><div><br></div><div>ATB,</div><div><br></div><div>P</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 11, 2016 at 7:42 AM, Paul Ramsey <span dir="ltr"><<a href="mailto:pramsey@cleverelephant.ca" target="_blank">pramsey@cleverelephant.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Your SE question inspired me to write up a post which has some remedies in the final section<div><br></div><div><a href="http://blog.cleverelephant.ca/2016/08/postgis-upgrade.html" target="_blank">http://blog.cleverelephant.ca/<wbr>2016/08/postgis-upgrade.html</a><span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888"><div><br></div><div>P</div></font></span></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 10, 2016 at 9:08 PM, Lee Hachadoorian <span dir="ltr"><<a href="mailto:Lee.Hachadoorian+L@gmail.com" target="_blank">Lee.Hachadoorian+L@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Running PostGIS on PostgreSQL 9.3 Linux Mint 17.2 using<br>
ubuntugis-unstable PPA. I had a working PostGIS 2.1.4. I recently apt<br>
upgraded to PostGIS 2.2.2. I then tried:<br>
<br>
ALTER EXTENSION postgis UPDATE TO "2.2.2";<br>
<br>
However this resulted in:<br>
<br>
ERROR: could not access file "$libdir/postgis-2.2": No such file<br>
or directory<br>
<br>
I posted about this to <a href="http://GIS.SE" rel="noreferrer" target="_blank">GIS.SE</a><br>
(<a href="http://gis.stackexchange.com/questions/206412/how-can-i-do-a-soft-upgrade-from-postgis-2-1-4-to-2-2-2" rel="noreferrer" target="_blank">http://gis.stackexchange.com/<wbr>questions/206412/how-can-i-do-<wbr>a-soft-upgrade-from-postgis-2-<wbr>1-4-to-2-2-2</a>).<br>
Paul Ramsey responded and helped me figure out that something went<br>
wrong with upgrade. (Thanks Paul!) At this point, I need to figure out<br>
whether I can salvage the installation. I wanted to avoid dump and<br>
restore, but at this point even dump is not working because of<br>
nonworking PostGIS. I'm moving this to postgis-users as the<br>
back-and-forth is more appropriate to a ML than <a href="http://GIS.SE" rel="noreferrer" target="_blank">GIS.SE</a><br>
<br>
I'm running into dependency issues. I was *not* able to downgrade<br>
because PostGIS 2.1 depends on GDAL 1.x, and I have already upgraded<br>
to GDAL 2.0. When I looked to see what would be involved in<br>
downgrading GDAL, apt wants to uninstall QGIS 2.16 and a bunch of<br>
other stuff.<br>
<br>
I apt uninstalled PostGIS 2.2 and reinstalled PostGIS 2.2. That<br>
database still thinks it's on PostGIS 2.1, which is missing, and<br>
CREATE EXTENSION fails (no control file) and ALTER EXTENSION fails as<br>
previously.<br>
<br>
Best,<br>
--Lee<br>
<span><font color="#888888"><br>
<br>
<br>
<br>
<br>
--<br>
Lee Hachadoorian<br>
Asst Professor of Geography, Dartmouth College<br>
<a href="http://geospatial.commons.gc.cuny.edu/" rel="noreferrer" target="_blank">http://geospatial.commons.gc.c<wbr>uny.edu/</a><br>
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</div></div></blockquote></div><br></div>