laut Anleitung beide, erst einige Dateien mit Compile und dan einige mit Install, so wies hier steht:
Delphi / BCB Installation
Open and compile in the following order:
IndySystem (in Lib\System)
IndyCore (in Lib\Core)
IndyProtocols (in Lib\Protocols)
IndySuperCore (in Lib\SuperCore)
If you are not using SuperCore, then you do not need to compile this
package.
Now open and click install in the following order
dclIndyCore (in Lib\Core)
dclIndyProtocols (in Lib\Protocols)
dclSuperCore (in Lib\SuperCore)
Only install this if you have compiled SuperCore.