This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Hi Ian- > Thanks, > . . . how do I know if I am running a 64 bit version? It will depend on what version of Windows you are running (e.g. XP, Vista). See the instructions at: http://support.microsoft.com/kb/827218 Don > Unidata IDV Support wrote: > > Hi Ian- > > > > I'm just following up on this. > > > > The Intel graphics chip seems to be prone to this problem. If you are > > running a 64 bit version of Windows, try using the 64-bit version of the > > IDV and see if you up the memory above 1Gb. > > > > Don Murray > > > > > >> Unidata IDV Support wrote: > >> > >>> Hi Ian- > >>> > >>> > >>> > >>>> I am following up on my question. I look forward to your response. > >>>> > >>>> > >>> Sorry for the delay in responding. > >>> > >>> > >> No worries > >> > >>>> I have modified the runIDV.bat file to allow for more memory usage. > >>>> The computer has over 3.4 gig of RAM > >>>> The video card has 1024 meg of RAM. > >>>> I have ensured all of the drivers on the video card are up to date and > >>>> we are running the latest version of java. > >>>> > >>>> IDV displays information fine when memory usage is set to 512.meg > >>>> When I go up over 958 meg, the map display stops working properly. (the > >>>> default boundaries of coastlines are not displayed and I get a black > >>>> screen) > >>>> Am I limited by the video card RAM? > >>>> > >>>> > >>> For the 32-bit version of Windows, the theoretical limit is 1.5 Gb that > >>> can be used by Java. On some systems, there seems to be a link between > >>> the system RAM and the video RAM so that moving above 1 Gb causes the > >>> problems you see. We do not have a solution for this at this time. What > >>> type of graphics card is this? > >>> > >>> > >> Hmmm, I do not know much about hardware, but the display settings under > >> Control Panel say Mobile Intel 4 Series Express Chipset Family . . . > >> does that help? > >> > >>>> Furthermore, loading derived quantities like 1000-500 mb thickness takes > >>>> a tremendous amount of time. Is there something I can do to speed that > >>>> up? > >>>> > >>>> > >>> In the 2.7u2 version of IDV, to do the thickness it would have to > >>> download all levels of the geopotential height, then slice and do the > >>> difference. In the IDV nightly build (2.8a1), it now only downloads the > >>> 1000 and 500 mb levels and does the difference. However, if you are > >>> using a high resolution grid, it will still take some time to download. > >>> You could reduce the resolution and/or spatial extent of the grid to > >>> speed up the download. > >>> > >>> Please note that the nightly builds come with a "big-boy" caveat, > >>> especially ones labeled with an "a" (alpha). At any point, it may have > >>> some instability issues, but in general, we try to make sure that it > >>> performs well. > >>> > >>> > >> Thanks! . . . I'll explore this > >> > >>> Don Murray > >>> > >>> Ticket Details > >>> =================== > >>> Ticket ID: KUJ-685967 > >>> Department: Support IDV > >>> Priority: Normal > >>> Status: Open > >>> > >>> > >>> > >> > > > > > > Ticket Details > > =================== > > Ticket ID: KUJ-685967 > > Department: Support IDV > > Priority: Critical > > Status: Closed > > > > > > Ticket Details =================== Ticket ID: KUJ-685967 Department: Support IDV Priority: Critical Status: Open