Once again Iâm struggling with NativeBoost. Iâm trying to use optCoerceNilToNull with this function: ^self call: #(LGitReturnCodeEnum git_commit_create( LGitId * theCommitId, LGitRepository repo, String update_ref, LGitSignature * theAuthor, LGitSignature * theCommitter, String message_encoding, String theMessage, LGitTree theTree, int parent_count, LGitCommit * parentsPointer)) options: #( optCoerceNilToNull ) The last argument can be NULL, per documentation, (no parents). LGitCommit is a subclass of NBExternalObject and apparently NBExternalObjctType>>pushAsPointer: does *not* use the optCoerceNilToNull option (the super implementation in NBExternalType>>pushAsPointer: however does). The upshot of course is that the call fails with âan instance of LGitCommit expectedâ. My questions: - The documentation says: "#optCoerceNilToNull" "passing nil as a pointer-type argument, converts it to C NULL â but apparently this doesnât apply to every pointer type. Should the documentation be updated? - Why does NBExternlObjectType not use optCoerceNilToNull? I donât want to use tricks to pass null if I donât have to. - Related: there are instances where even non-pointer arguments are allowed to be NULL. Why does optCoerceNilToNull only work for pointer types? Igor! Help! :) Cheers, Max