I use the method Block.AddPartInstance which does not have a rotation argument.
If I give the symbol name as Symname.3 which is the rotated symbol in the library, the rotated symbol is placed but there is an error message in Dx output window:
Note 1202: Extension not file compatible - 3.1
Error 1086: invalid block name - Symname.3.1
Should I ignore these messages or is there a better way to do this?