Hello, I recently stumbled on a problem and am wondering whether it comes from a misunderstanding or a bad usage. When a custom toplevel is built using the [ocamlmktop] program, it seems that the modules which are « included » must be present in the path when the so-built toplevel is executed afterwards. For example, suppose that directory « bar » contains a file foo.ml, with, let say the definition « let v=100 ». Then, making ocamlfind ocamlc -c -o foo.cmo foo.ml ocamlfind ocamlc -a -o foo.cma foo.cmo ocamlfind ocamlmktop -o foo.top foo.cma creates foo.top, which, when executed, behaves has expected. $ ./foo.top OCaml version 4.06.0 # Foo.v;; - : int = 100 But, when trying to execute foo.top from another directory, for ex from ../bar, i get the following error : $ ./bar/foo.top OCaml version 4.06.0 # Foo.v;; Error: Unbound module Foo The error disappears if i add option « -I ./bar » when lauching foo.top (or, equivently execute the directive « #directory ./bar »). Is there a way to build a « self-contained » custom toplevel which could be executed without any explicit reference to the modules it included at creation ? Jocelyn ps : i tried the -custom option but, not surprisingly, it does not solve the pb since it only refers to external C code.