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[IDV #QHB-724761]: Question about "Making data source local" option.
- Subject: [IDV #QHB-724761]: Question about "Making data source local" option.
- Date: Wed, 05 Aug 2009 16:08:45 -0600
Hi Jay-
Thanks to Tom Whittaker's help, I think I have a solution that sets the first
word to 0 for ADDE images. It will be in tomorrow's build. Let me know if
that solves your problem.
Thanks to Dave for addressing the IMGLIST issue.
Don
> > A user in CIMSS and I have been trying out the "Making data source
> > local" option to create area files. I've been using the latest IDV
> > nightly (from August 3rd), and the area files I'm producing are not
> > usable in the -V Local ADDE Manager or in -X.
> >
> > I've talked with TomW and DaveS and they've indicated the problem to
> > me... that a zero needs to be written into the first word of the area
> > file. TomW mentioned that you had released a change on 1 July which
> > does this, and it was included in the last visad.jar file. So, I'm
> > wondering if this change was lost, not implemented at the moment, or
> > broken, etc. Here is the latest from TomW:
>
> As you point out, the problem is that the first word is not 0. There is
> conflicting documentation on this. If it's truly a bad image, why can one do
> an IMGLIST on it?
>
> That being the case, I have not yet implemented the change I made in
> visad.jar in the IDV. That requires some overhead which I'm not sure I want
> to incur in the IDV. Currently, we just write the ADDE stream directly to
> disk and the first word is not 0 in an ADDE Image object. Using the VisAD
> fix, I'd have to create an AreaFile out of each stream and then use the new
> method to write to disk. My attempts to just set word 0 after writing out
> the ADDE stream fail on Windows because it locks the file and doesn't allow a
> subsequent write. It probably works on Linux, but I haven't had a chance to
> test it there.
>
> Dave Santek's workaround is to do an LWU POKE 0 0 on each file. However, the
> file names have to be short or you have to create links to each file with a
> short name since LWU doesn't handle long names/paths. But, that will work.
>
>
Ticket Details
===================
Ticket ID: QHB-724761
Department: Support IDV
Priority: Normal
Status: Open