Hey @Maritimo, did you set the USE_CPP_PACKAGE=1 flag when compiling? Otherwise the CPP bindings won’t be generated and the op.h file will be missing indeed.
Thank you ThomasDelteil, in effect, that was my mistake. I rebuild everything with USE_CPP_PACKAGE=1 set and the missing op.h was generated. In a matter of fact, all the cpp-package files were also compiled automatically.