PLS-00907 Error but referenced package compiled

Question

Hi I am experiencing some problems with Database Link.
In DEV Environment,
I have two database, DB A and DB B.
In DB A I have package name SUPPORT_PKG and inside it I have a function named HISTORY_UPDATE.
Package is compiled correctly in DB A and working fine.
I created a procedure CALL_HIST_UPD in DB B to execute SUPPORT.PKG.HISTORY_UPDATE@A through DB LINK.
and it gave me PLS-00907 error.
UAT environment has the same setup of user and package as DEV.
then I tried to copy the CALL_HIST_UPD to DB B in UAT and it can be compiled sucessfully in UAT.so I do the following
Back to Dev again
I tried to figure what's going on until I decided to replace the header specification SUPPORT.PKG.HISTORY_UPDATE
with the declaration part from the body and recompiled the whole package again, and this time I can compile the procedure in DB B.
I am curious and check the header in UAT and found that UAT Headers is the same exactly with the DEV Headers
before I replaced it with the new one by copying from the body. I am curious why the DEV environment give the PLS-00907 error at the first time, even at that time package in A are compiled nicely.
Let me know if the question is not clear.
thanks for your help

Answer 1

Try this -
CREATE OR REPLACE PACKAGE data_mgmt AUTHID CURRENT_USER
IS
   FUNCTION hy_name (in_dt DATE, in_option_txt VARCHAR2)
      RETURN VARCHAR2;
END data_mgmt;
CREATE OR REPLACE PACKAGE BODY data_mgmt
IS
   FUNCTION hy_name (in_dt DATE, in_option_txt VARCHAR2)
      RETURN VARCHAR2
   IS
      return_txt   VARCHAR2 (25);
   BEGIN
      RETURN return_txt;
   END hy_name;
END data_mgmt;
/