In article <23jmetINNen7 at phage.cshl.org>, oconnorb at phage.cshl.org ( CSHL) writes:
|> I have had trouble uncompressing files with the command LZDCMP -X2.
My comments refer to the version of LZDCM we run here but I suspect it is
identical in behaviour.
|> I ftp to NCBI and get flatfiles of SWISSPROT and PROSITE. This also
|> occurs when I ftp to fconvx.ncifcrf.gov for GenPept. When I begin
|> to uncompress the files I get the following error message:
|> ACCESS VIOLATION, REASON MASK=04, VIRTUAL ADDRESS=000021FF
|> SYMBOLIC STACK FOLLOWS...
I suspect that you need to transfer the files in binary mode. Depending
from your setup, you start FTP will transfer only as ASCII mode. During
the transfer you see literally no difference, e.g.
FTP> get xembl.ref.Z xembl.ref_Z
200 PORT command successful.
150 Opening ASCII mode data connection for xembl.ref.Z (1952402 bytes).
226 Transfer complete.
local: XEMBL.REF_Z remote: xembl.ref.Z
1952402 bytes received in 00:00:08.57 seconds
FTP> bin
200 Type set to I.
FTP> get xembl.ref.Z xembl.ref__Z
200 PORT command successful.
150 Opening BINARY mode data connection for xembl.ref.Z (1952402 bytes).
226 Transfer complete.
local: XEMBL.REF__Z remote: xembl.ref.Z
1952402 bytes received in 00:00:06.00 seconds
FTP> exit
However, the files uncompress differently:
yogi > lzdcm xembl.ref__Z test.1
yogi > lzdcm xembl.ref_Z test.2
Incorrect first header byte 0xCD
Error when decompressing "xembl.ref_z" to "test.2"
%F, abort
and have different RMS attributes:
yogi > dir/full *.*Z
Directory D$DAY:[DOELZ]
XEMBL.REF_Z;1 File ID: (902,3481,0)
Size: 3841/3843 Owner: [BIOGEN,DOELZ]
Created: 3-AUG-1993 07:51:55.72
Revised: 3-AUG-1993 07:52:04.45 (1)
Expires: <None specified>
Backup: <No backup recorded>
File organization: Sequential
File attributes: Allocation: 3843, Extend: 0, Global buffer count: 0
No version limit
Record format: Variable length, maximum 4168 bytes
Record attributes: Carriage return carriage control
RMS attributes: None
Journaling enabled: None
File protection: System:RWE, Owner:RWED, Group:, World:
Access Cntrl List: None
XEMBL.REF__Z;1 File ID: (904,3990,0)
Size: 3814/3816 Owner: [BIOGEN,DOELZ]
Created: 3-AUG-1993 07:52:13.98
Revised: 3-AUG-1993 07:52:20.08 (1)
Expires: <None specified>
Backup: <No backup recorded>
File organization: Sequential
File attributes: Allocation: 3816, Extend: 0, Global buffer count: 0
No version limit
Record format: Fixed length 512 byte records
Record attributes: None
RMS attributes: None
Journaling enabled: None
File protection: System:RWED, Owner:RWED, Group:RWED, World:RWED
So the advice would be to retry and make sure to be in binary mode
during transfer ('bin' is the command on the ftp prompt). May I further
suggest to try a small file first to save network bandwidth.
Regards
Reinhard
PS: I believe this has nothing to do with GCG :-)
--
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