> > > I agree to make 32-bit and 64-bit compatible. In the long run, everything will be 64-bit, so I would suggest
> > > in breaking the 32-bit ODB, add some padding there where needed, probably with some conditional compiling.
> > 1) midas.h: remove unused field "dispatch" from EVENT_REQUEST and bump DATABASE_VERSION from 2 to 3
> > 2) msystem.h: add 32-bit padding to CHN_STATISTICS and CHN_SETTINGS

I am now trying a different solution of to fixing the issue of CHN_STATISTICS and CHN_SETTINGS changing size.

1) midas.h: (same as before) remove unused field "dispatch" from EVENT_REQUEST and bump DATABASE_VERSION from 2 to 3
2) msystem.h: in CHN_STATISTICS and CHN_SETTINGS change type of "event_limit" and "files_written" from int to "double".

Below are the latest ODBv3 meta patches:

ladd03:midas$ svn diff
Index: include/midas.h
===================================================================
--- include/midas.h     (revision 3844)
+++ include/midas.h     (working copy)
 /* has to be changed whenever binary ODB format changes */
-#define DATABASE_VERSION 2
+#define DATABASE_VERSION 3
.........
    short int trigger_mask;       /**< trigger mask                    */
    INT sampling_type;            /**< GET_ALL, GET_SOME, GET_FARM     */
-                                 /**< dispatch function */
-   void (*dispatch) (HNDLE, HNDLE, EVENT_HEADER *, void *);
 } EVENT_REQUEST;

Index: include/msystem.h
===================================================================
--- include/msystem.h   (revision 3845)
+++ include/msystem.h   (working copy)
-"Event limit = DWORD : 0",\
+"Event limit = DOUBLE : 0",\
..................
-"Files written = INT : 0",\
+"Files written = DOUBLE : 0",\
..................
-   DWORD event_limit;
+   double event_limit;
..................
-   INT files_written;
+   double files_written;

K.O.