Hello, by default OpenDCL Studio is installed to the Program Files (x86) folder. But it should be not the reason that the OpenDCL command is missing. Have a look at the Common Files folder. Is there an OpenDCL subfolder?
When Studio or Runtime is installed, the following keys are set for each installed supported AutoCAD product:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R18.2\ACAD-A000:407\Applications\OpenDCL]
"Loader"="C:\\Program Files (x86)\\Common Files\\OpenDCL\\OpenDCL.x64.18.arx"
"Description"="OpenDCL"
"LoadCtrls"=dword:0000000c
[HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\AutoCAD\R18.2\ACAD-A000:407\Applications\OpenDCL\Commands]
"OPENDCL"="OPENDCL"
Regards, Fred