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During the installation of ArcGIS ArcView, ArcEditor or ArcInfo, the following error displays:
"Error 1904: Module C:\Program Files\ArcGIS\bin\NCSEcw.dll failed to register."
ERMapper's ECW plug-in installs DLLs into the ArcGIS installation\bin directory. Installing ArcGIS 9.x without uninstalling the Enhanced Compression Wavelet (ECW) plug-in results in an error registering NCSEcw.dll during the installation of ArcGIS Desktop.
If choosing to Abort the installation upon encountering the error, rename the three DLLs listed in step 2 and start the ArcGIS 9.x installation again.
This reinstalls the files with the correct version and solves the conflict. The files have the following version and date modified:
ncscnet.dll Version 188.8.131.52 10/12/2006
ncsecw.dll Version 184.108.40.2060 10/12/2006
ncsutil.dll Version 220.127.116.11 10/12/2006