Oracle Message PCC-02405 - Variable is of undefined type

ERRORVariable is of undefined type
CAUSENo declaration was found for the type identifier of the variable.
ACTIONProvide a valid declaration for the type of the host variable. If using objects in your program, check that the OTT-generated header for the object type was #included and that the typefile was specified in the INTYPE option on the Pro*C command line.