[udf-dlm-develop] nasty problem 2.

[Harald F. <hf...@ap...>]

In response to Ed's email:

* I had 0.51 running, but even now with 0.52 the same problem persists.

* I am as sure as you can be with UDF, that I have the right key.

* From a brand new IDL session the command 
fh = udf_open(key, [1999,337,7,21,11,530], [1999,337,7,27,21,538])
works just fine.

* Here is the log of my latest try, which interestingly enough, now also happens 
to crash from the IDL prompt. So I don't need my widget program anymore. My 
comments are shown with *****

IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,337,7,21,11,530], [1999,337,7,27,21,538])
IDL> help,key,fh
KEY             ULONG     =    101220482
FH              INT       =      601
IDL> d=udf_read(fh)
IDL> udf_close,fh
****** First try in new session just fine. ****** 
IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,337,7,21,11,530], [1999,337,7,27,21,538])
IDL> help,key,fh   
KEY             ULONG     =    101220482
FH              INT       =      601
IDL> udf_close,fh
******* The same file again and everything is fine ****** 
IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,186,1,42,16,686], [1999,186,2,56,26,798])
IDL> d=udf_read(fh)
IDL> udf_close,fh
****** Second try with going back in time was successful too. ****** 
IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,189,12,54,5,447], [1999,189,18,52,15,730])
% UDF_OPEN: no data for this time period
% Execution halted at:  $MAIN$                 
IDL> help,key,fh
KEY             ULONG     =    101220482
FH              INT       =      601
****** Now going forward in time does not work. ****** 
IDL> exit
image1 [25] idl
IDL Version 5.3 (sunos sparc). (c) 1999, Research Systems, Inc.
Installation number: 8082.
Licensed for use by: Space Physics Research Group
******** Opening a new IDL session ****** 
IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,189,12,54,5,447], [1999,189,18,52,15,730])
IDL> d=udf_read(fh)
IDL> help,key,fh
KEY             ULONG     =    101220482
FH              INT       =      601
IDL> udf_close,fh
******** The previous problem is no problem in the new session ****** 
IDL> key=UDF_Key(vinst_to_full_path('IMF12LSI'))
IDL> fh = udf_open(key, [1999,337,7,21,11,530], [1999,337,7,27,21,538])
% UDF_OPEN: no data for this time period
% Execution halted at:  $MAIN$                 
******** The very first try of the previous session is now a problem, because it
******** is later than the previously called time period.


Another interesting by-product is, that we rebuilt our UDF database. With the 
command
times=udf_times(key)
I previously got 12 starting and ending times (for 5 files), and now I get 18 
starting and ending times. Each time is shown 5 times, except the last one, 
which is only 2 times in the database. May not be related to the problem, but 
who knows this for sure with UDF?

Harald


=========================================================
Harald U. Frey 
Space Sciences Lab	   phone: 510-643-3323
University of California   fax:   510-643-2624      
Berkeley, CA 94720-7450    email: hf...@ss...