Failure: "Pa_type_conv: \"type_of\" is not a supported type generator. (supported generators: )"

[advancedwebdeveloper]

Got this error while compiling on win32 (MSVC) for Ocaml 4:

mkdir lib
''ocamlfind ocamldep -package type_conv -syntax camlp4o -modules lib/type.mli > lib/type.mli.depends
''ocamlfind ocamlc -c -g -package type_conv -syntax camlp4o -I lib -o lib/type.cmi lib/type.mli
''ocamlfind ocamldep -package type_conv -syntax camlp4o -modules lib/type.ml > lib/type.ml.depends
''ocamlfind ocamldep -package type_conv -syntax camlp4o -modules lib/value.mli > lib/value.mli.depends
''ocamlfind ocamlc -c -g -package type_conv -syntax camlp4o -I lib -o lib/value.cmi lib/value.mli
''ocamlfind ocamldep -package type_conv -syntax camlp4o -modules lib/value.ml > lib/value.ml.depends
''ocamlfind ocamlc -c -g -package type_conv -syntax camlp4o -I lib -o lib/type.cmo lib/type.ml
''ocamlfind ocamlc -c -g -package type_conv -syntax camlp4o -I lib -o lib/value.cmo lib/value.ml
''ocamlfind ocamlc -pack -g lib/type.cmo lib/value.cmo -o lib/dyntype.cmo
''ocamlfind ocamlc -a lib/dyntype.cmo -o lib/dyntype.cma
''ocamlfind ocamlopt -c -g -package type_conv -syntax camlp4o -for-pack Dyntype -I lib -o lib/type.cmx lib/type.ml
''ocamlfind ocamlopt -c -g -package type_conv -syntax camlp4o -for-pack Dyntype -I lib -o lib/value.cmx lib/value.ml
''touch lib/dyntype.mli ; if ocamlfind ocamlopt -pack -g -I lib lib/type.cmx lib/value.cmx -o lib/dyntype.cmx ; then rm -f lib/dyntype.mli ; else rm -f lib/dyntype.mli ; exit 1; fi
''ocamlfind ocamlopt -a lib/dyntype.cmx -o lib/dyntype.cmxa
mkdir pa_lib
''ocamlfind ocamldep -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -modules pa_lib/p4_helpers.ml > pa_lib/p4_helpers.ml.depends
''ocamlfind ocamldep -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -modules pa_lib/p4_type.ml > pa_lib/p4_type.ml.depends
''ocamlfind ocamlc -c -g -I lib -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -I pa_lib -I lib -o pa_lib/p4_helpers.cmo pa_lib/p4_helpers.ml
''ocamlfind ocamldep -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -modules pa_lib/p4_value.ml > pa_lib/p4_value.ml.depends
''ocamlfind ocamldep -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -modules pa_lib/pa_type.ml > pa_lib/pa_type.ml.depends
''ocamlfind ocamlc -c -g -I lib -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -I pa_lib -I lib -o pa_lib/p4_type.cmo pa_lib/p4_type.ml
''ocamlfind ocamldep -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -modules pa_lib/pa_value.ml > pa_lib/pa_value.ml.depends
''ocamlfind ocamlc -c -g -I lib -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -I pa_lib -I lib -o pa_lib/p4_value.cmo pa_lib/p4_value.ml
''ocamlfind ocamlc -c -g -I lib -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -I pa_lib -I lib -o pa_lib/pa_type.cmo pa_lib/pa_type.ml
''ocamlfind ocamlc -c -g -I lib -package type_conv -package camlp4.quotations -package camlp4 -syntax camlp4o -I pa_lib -I lib -o pa_lib/pa_value.cmo pa_lib/pa_value.ml
''ocamlfind ocamlc -pack -g pa_lib/p4_helpers.cmo pa_lib/p4_type.cmo pa_lib/p4_value.cmo pa_lib/pa_type.cmo pa_lib/pa_value.cmo -o pa_lib/pa_dyntype.cmo
''ocamlfind ocamlc -a lib/dyntype.cmo pa_lib/pa_dyntype.cmo -o pa_lib/pa_dyntype.cma
mkdir lib_test
''ocamlfind ocamldep -package type_conv -package oUnit -syntax camlp4o -modules lib_test/suite.ml > lib_test/suite.ml.depends
''ocamlfind ocamldep -package type_conv -package oUnit -syntax camlp4o -modules lib_test/test_type.ml > lib_test/test_type.ml.depends
File "lib_test/test_type.ml", line 4, characters 36-43:
Failure: "Pa_type_conv: "type_of" is not a supported type generator. (supported generators: )"
Preprocessing error on file lib_test/test_type.ml
Exit code 2 while executing this command:
''ocamlfind ocamldep -package type_conv -package oUnit -syntax camlp4o -modules lib_test/test_type.ml > lib_test/test_type.ml.depends
E: Failure("Command 'C:\ocamlms\bin\ocamlbuild.EXE -classic-display -no-log -no-links -install-lib-dir C:/ocamlms/lib\ocamlbuild -byte-plugin lib/dyntype.cma lib/dyntype.cmxa lib/dyntype.lib pa_lib/pa_dyntype.cma lib_test/suite.byte -tag debug -j 2' terminated with error code 2")
Makefile:16: recipe for target `build' failed
make: *** [build] Error 1