| savefile incompatibilities... [message #9486] |
Wed, 02 July 1997 00:00  |
Richard G. French
Messages: 65
Registered: June 1997
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Member |
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I have recently upgraded to IDL5.0 on a DEC Alpha running OSF. I have
created
some save files that contain variables ONLY (NOT any routines, NO system
variables, and only some explicitly listed variables) using a command
such as
save,file=savefilename,variable1, variable2, etc....
I then ported this file by binary ftp to a Sun workstation running
IDL4.0 and
tried to restore the savefile. I get 'Unexpected item code' and then IDL
crashes.
My reading of the manual implies that as long as you read variables, and
not
system variables or compiled routines, savefiles are supposed to be
readable
across platforms and across versions of IDL.
I tried restoring the file on a DECstation running an ancient version of
IDL (since
RSI does not support DECstations anymore) and got a similar message:
unexpected
item code (but IDL did not crash, and it did seem to do the proper
restoration in spite
of the error message.)
My question is:
Am I mistaken in thinking that I should be able to read savefiles
with variables
across platforms and across IDL versions? In this case, the variables
are primarily
structures, but I don't think they use any of the new properties of
structures of
IDL5.0.
We are working on software development and data analysis at two
different
sites, and a key assumption we have been making is that we can share
data and
intermediate results by porting savefiles. If this is wrong, I need to
figure out
another way to do it.
Is the documentation wrong, or is there a bug in 5.0?
Dick French
rfrench@ahab.wellesley.edu
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| Re: savefile incompatibilities... [message #9531 is a reply to message #9486] |
Tue, 08 July 1997 00:00  |
Richard G. French
Messages: 65
Registered: June 1997
|
Member |
|
|
My apologies - I made a mistake in the spelling of the hostname where
these
savefiles are located. I have corrected the message below and would
greatly
appreciate it if some of you with SUN's could let me know if you can
read
and restore test4.sav without problems. Please send your results to
rfrench@ahab.wellesley.edu, along the the version of your operating
system
(find this on the first line or so of /etc/motd). I'll summarize as
appropriate.
RSI has been notified of my problem but on their SUN's the savefile is
restored properly - I just have the bad luck to have it not work on
ours, and
I would like to understand why, and possibly how to get around the
problem.
Many thanks.
> I have done some more testing with savefile problems. The long and
> short
> of it is that I am having problems porting savefiles between DEC
> Alpha,
> DECstation and a SUN sparc.
> The Sun is running IDL4.0.1, the Alpha is running OSF/1 and IDL 5.0,
> and
> the
> DECstation is running IDL3.6. To see if the problem is an IDL5.0
> problem, I created 4 test savefiles, which I have put on my anonymous
> ftp site. I would appreciate hearing from
> people to see if you are able to restore the file without problems.
> Please login to
> anonymous ftp on
> ahab.wellelsey.edu
> ftp> cd pub/rsi
> ftp> bin
> ftp> mget test*.sav
> ftp> quit
>
> Here is a description of the individual savefiles.
>
> 1) test1.sav
> Created the savefile under DEC ALPHA (Unix) IDL5.0. Should contain
>
> variables only, no procedures or system variables. Results so far:
> crashes IDL on sun sparc IDL4.0.1
> Readable on DECstation running IDL3.6
>
> 2) test2.sav
> Smaller version of test1.sav (same variables saved, but array of
> structures is smaller).
> This was to see if the problem was associated with a memory
> problem.Results so far: crashes IDL on sun sparc IDL4.0.1
> Readable on DECstation running IDL3.6
>
> 3) test3.sav
> To see if problem was an IDL5.0 problem, I restored test2.sav on a
> DECstation running
> IDL3.6, and then immediately did
> save,/variables,file='test3.sav'
> Results so far:
> crashes IDL on sun sparc IDL4.0.1
> Readable on DEC Alpha Unix IDL5.0
>
> 4) test4.sav
> In desperation, I set the /xdr flag when saving the file. Created
> as
> test3.sav except:
> save,/variables,/xdr,file='test4.sav'
> Results so far:
> crashes IDL on sun sparc IDL4.0.1
> Readable on DEC Alpha Unix IDL5.0
>
> I have reported this problem to RSI but I think it might be very
> helpful
> to get more test
> results on other platforms.
>
> This problem is preventing us from being able to use the
> cross-platform
> strengths of IDL
> and is really cramping our research at the moment. I would appreciate
> hearing from
> anyone who might have ideas about how to get around this problem. The
> SUN sparc
> owners let their maintenance lapse due to the high cost, and so
> upgrading to IDL5.0
> is not an option.
>
> Thanks very much.
>
>> Dick French
>> rfrench@ahab.wellesley.edu
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| Re: savefile incompatibilities... [message #9580 is a reply to message #9486] |
Mon, 14 July 1997 00:00 |
Inigo Garcia
Messages: 13
Registered: June 1997
|
Junior Member |
|
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Hi:
I work in a UltraSparc with IDL 5.0, operating system SunOS 5.5.1
I brougth teh test1.sav file, and I was able to restore it. What I get
if I type "HELP" is the next:
---------------------------------------------------------
CATALOG STRUCT = -> HST Array[54]
CATALOG_NAME STRING = 'C5Vaug'
ID STRING = '5836C5Vaug'
LABEL STRING = 'Saturn C5Vaug'
N_IMAGES_CATALOG
INT = 54
PID STRING = '5836'
---------------------------------------------------------
I supose that that is all that was in that file !!!
Cheers,
I~nigo.
Richard G. French wrote:
>
> My apologies - I made a mistake in the spelling of the hostname where
> these
> savefiles are located. I have corrected the message below and would
> greatly
> appreciate it if some of you with SUN's could let me know if you can
> read
> and restore test4.sav without problems. Please send your results to
> rfrench@ahab.wellesley.edu, along the the version of your operating
> system
> (find this on the first line or so of /etc/motd). I'll summarize as
> appropriate.
> RSI has been notified of my problem but on their SUN's the savefile is
> restored properly - I just have the bad luck to have it not work on
> ours, and
> I would like to understand why, and possibly how to get around the
> problem.
> Many thanks.
>
>> I have done some more testing with savefile problems. The long and
>> short
>> of it is that I am having problems porting savefiles between DEC
>> Alpha,
>> DECstation and a SUN sparc.
>> The Sun is running IDL4.0.1, the Alpha is running OSF/1 and IDL 5.0,
>> and
>> the
>> DECstation is running IDL3.6. To see if the problem is an IDL5.0
>> problem, I created 4 test savefiles, which I have put on my anonymous
>> ftp site. I would appreciate hearing from
>> people to see if you are able to restore the file without problems.
>> Please login to
>> anonymous ftp on
>> ahab.wellelsey.edu
>> ftp> cd pub/rsi
>> ftp> bin
>> ftp> mget test*.sav
>> ftp> quit
>>
>> Here is a description of the individual savefiles.
>>
>> 1) test1.sav
>> Created the savefile under DEC ALPHA (Unix) IDL5.0. Should contain
>>
>> variables only, no procedures or system variables. Results so far:
>> crashes IDL on sun sparc IDL4.0.1
>> Readable on DECstation running IDL3.6
>>
>> 2) test2.sav
>> Smaller version of test1.sav (same variables saved, but array of
>> structures is smaller).
>> This was to see if the problem was associated with a memory
>> problem.Results so far: crashes IDL on sun sparc IDL4.0.1
>> Readable on DECstation running IDL3.6
>>
>> 3) test3.sav
>> To see if problem was an IDL5.0 problem, I restored test2.sav on a
>> DECstation running
>> IDL3.6, and then immediately did
>> save,/variables,file='test3.sav'
>> Results so far:
>> crashes IDL on sun sparc IDL4.0.1
>> Readable on DEC Alpha Unix IDL5.0
>>
>> 4) test4.sav
>> In desperation, I set the /xdr flag when saving the file. Created
>> as
>> test3.sav except:
>> save,/variables,/xdr,file='test4.sav'
>> Results so far:
>> crashes IDL on sun sparc IDL4.0.1
>> Readable on DEC Alpha Unix IDL5.0
>>
>> I have reported this problem to RSI but I think it might be very
>> helpful
>> to get more test
>> results on other platforms.
>>
>> This problem is preventing us from being able to use the
>> cross-platform
>> strengths of IDL
>> and is really cramping our research at the moment. I would appreciate
>> hearing from
>> anyone who might have ideas about how to get around this problem. The
>> SUN sparc
>> owners let their maintenance lapse due to the high cost, and so
>> upgrading to IDL5.0
>> is not an option.
>>
>> Thanks very much.
>>
>>> Dick French
>>> rfrench@ahab.wellesley.edu
--
\\|//
(o o)
+-----------------------oOOo-(_)-oOOo----------------------- --+
| I~nigo Garcia Ruiz |
| Kapteyn Instituut Phone: +31-(0)50-3634083 |
| Landleven 12 Fax: +31-(0)50-363 |
| 9747 AD GRONINGEN (Netherlands) e-mail: iruiz@astro.rug.nl |
+----------------------------------------------------------- --+
|
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