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I have followed the solutions to setting up ECW in QGIS. However, none of them work.

In addition I get a mount - access denied error when trying to load the gdal-ecw and gdal-mrsid plug-ins using the OSGeo4W installer in advanced mode. Any workarounds for this?

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Running the installer as administrator should fix the "access denied" error. – underdark Mar 14 '13 at 22:04
How do you run the OSGeo4W installer as administrator? – Nic Gellie Mar 14 '13 at 22:29
Right-click "Run as Administrator". However, OSGeo4W has dropped ECW support. See and… – Luke Mar 15 '13 at 1:47
You could try grabbing a gdal binary build from which still has ECW support (old v3.3) and copying libecwj2.dll to somewhere in your path and gdal_ECW_JP2ECW.dll to the gdal plugins dir. – Luke Mar 15 '13 at 2:01
have you tried – underdark Mar 15 '13 at 12:00

This was said to work (on the mailing list

  1. from this archive ( copy gdal_ECW_JP2ECW into C:\OSGeo4W\bin\gdalplugins\1.9 directory.

  2. copy all other dll of previous archive in C:\OSGeo4W\bin and C:\Windows\System32 directories

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For those who have installed the standalone version, the dll should go into C:\Program files (x86)\Quantum GIS Lisboa\bin\gdalplugins\1.9 – AndreJ Apr 14 '13 at 18:47

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