<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div><br></div><div dir="ltr" data-setdir="false">Hi,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I am using Visual Studio 2010 and developing a C# project. I have downloaded gdal-202-1600-x64-core.msi<font size="2"> </font>and gdal-202-1600-x64-filgdb.msi from the following website:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"> "<span><a href="http://www.gisinternals.com/query.html?content=filelist&file=release-1600-x64-gdal-2-2-3-mapserver-7-0-7.zip" rel="nofollow" target="_blank" class="enhancr_card_2492032458">GISInternals Support Site</a></span></div><div dir="ltr" data-setdir="false"><div><br></div><div dir="ltr" data-setdir="false">I have installed those two installations. They are installed at "C:\Program Files\GDAL".</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">I prepared a very small C# Project. I added the files "gdal_csharp.dll", "ogr_csharp.dll" and "osr_csharp.dll" as reference. And I copied all files and folders in "<span><span style="color: rgb(0, 0, 0); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;">C:\Program Files\GDAL"</span></span> folder to "bin\x64\debug" folder.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">The code is as follows:</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Ogr.RegisterAll();</div><div dir="ltr" data-setdir="false">string sourceFile = "gltp:/vrf:D:/v0eur_5-xx/noamer/lib_116";</div><div dir="ltr" data-setdir="false">DataSource dataSource = Ogr.Open(sourceFile, 0);</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">The directory is a VMAP file. Unfortunately datasource is null after execution of last line. However I had used the same line of code with Visual Studio 2005 by using "FWTools" files instead of the two installations I mentioned above and it works. ("datasource" is not null.)</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Can you help me about this subject?</div></div></div></body></html>