topic System.DllNotFoundException:Unable to load DLL 'ArcGISVersion.dll' in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/system-dllnotfoundexception-unable-to-load-dll/m-p/561580#M15149 <HTML><HEAD></HEAD><BODY><SPAN>I cannot find an ArcEngine 10.1 specific forum so I am putting this here in ArcObjects SDK.</SPAN><BR /><BR /><SPAN>We have a WinForms application using ArcEngine 10.1 deployed to many Windows XP/Windows 7 32 bit machines.</SPAN><BR /><SPAN>It works fine.</SPAN><BR /><BR /><SPAN>The same application fails on startup on a Windows 7 64-bit machine. </SPAN><BR /><SPAN>Failure happens at the licensing stage.</SPAN><BR /><BR /><SPAN>The only solution I could find seemingly related to this error is this...</SPAN><BR /><BR /><SPAN>"OK, I found something here. We have to set project Build Platform target to x64 instead of x86. Then runtime binding and license checking will work correctly."</SPAN><BR /><BR /><SPAN>Before I put in effort to make a 64-bit build....</SPAN><BR /><BR /><SPAN>Has anyone seen this error? What is the known solution?</SPAN><BR /><BR /><SPAN>[ATTACH=CONFIG]23550[/ATTACH]</SPAN></BODY></HTML> Tue, 16 Apr 2013 13:43:02 GMT Alaind_Espaignet 2013-04-16T13:43:02Z System.DllNotFoundException:Unable to load DLL 'ArcGISVersion.dll' https://community.esri.com/t5/arcobjects-sdk-questions/system-dllnotfoundexception-unable-to-load-dll/m-p/561580#M15149 <HTML><HEAD></HEAD><BODY><SPAN>I cannot find an ArcEngine 10.1 specific forum so I am putting this here in ArcObjects SDK.</SPAN><BR /><BR /><SPAN>We have a WinForms application using ArcEngine 10.1 deployed to many Windows XP/Windows 7 32 bit machines.</SPAN><BR /><SPAN>It works fine.</SPAN><BR /><BR /><SPAN>The same application fails on startup on a Windows 7 64-bit machine. </SPAN><BR /><SPAN>Failure happens at the licensing stage.</SPAN><BR /><BR /><SPAN>The only solution I could find seemingly related to this error is this...</SPAN><BR /><BR /><SPAN>"OK, I found something here. We have to set project Build Platform target to x64 instead of x86. Then runtime binding and license checking will work correctly."</SPAN><BR /><BR /><SPAN>Before I put in effort to make a 64-bit build....</SPAN><BR /><BR /><SPAN>Has anyone seen this error? What is the known solution?</SPAN><BR /><BR /><SPAN>[ATTACH=CONFIG]23550[/ATTACH]</SPAN></BODY></HTML> Tue, 16 Apr 2013 13:43:02 GMT https://community.esri.com/t5/arcobjects-sdk-questions/system-dllnotfoundexception-unable-to-load-dll/m-p/561580#M15149 Alaind_Espaignet 2013-04-16T13:43:02Z