>From: "M. L. Baeck" <address@hidden> >Organization: Princeton University >Keywords: 200009112348.e8BNm5b26728 Unidata-Wisconsin image MCIDAS LWTOA3 >pnga2area Mary Lynn and Jim, Jim previously noted: >Yes, someone here has been trying to contact you for support. The >email was sent unidata.ucar.org instead of .edu. Oops... Those emails must have bounced. >I will forward a >copy. In the meantime, we have installed the LDM software on our LINUX >machine and we are waiting to get access to the upstream feed site from >that machine. If all goes well there, we may abandon the SGI IRIX 6.2 >OS and run with the Linux machine. OK. The decoder code should work with no problems on either platform. Can I ask what flavor of Linux you are using? Unidata supports RedHat (it is the only Linux platform we have for testing). I personally use RH 6.2 at home, so the ldm-mcidas code has gotten a pretty thorough workout in this environment. Slackware users have been known to have problems with a variety of things in the past, so please beware. >If there is a quick fix to the SGI IRIX decoder problem (as stated in >the previous email) we would appreciate it so that we are running with >the PNG compression for Friday. If not, we will hope to get the LINUX >site up and going by then. There should be. Please see below. >Thanks >Jim Smith > >>Date: Wed, 13 Sep 2000 10:56:11 -0400 >>To: address@hidden, address@hidden >>Subject: for Tom Yoksas >Hi - >I am working with Jim Smith at Princeton University to reconfigure our >LDM server for the PNG compression. Our server is running on an SGI >IRIX machine, OS 6.2. I have downloading the ldm-mcidas 7.6.4 decoders >for 6.5. I reconfigures the pqact.conf file to include the pnga2area >decoder and then checked it by executing > >pqact -vxl- -q /dev/null /data5/LDM/etc/pqact.conf If you are running a current distribution of the LDM, you can check the integrity of the pqact.conf file by running: ldmadmin pqactcheck This invocation is essentially running the command that you include above. I must warn you, however, that this check does not find all problems in pqact.conf. One problem that will not be found, but that is deadly is a line that has a blank (a space) at the beginning of the line. This is not allowed, and will cause all patterns after this point to be ignored by pqact when it goes to process products. >and got a response saying unknown feed name in feedtype expression >"MCIDAS ^pngarea Q. (..) and so on. OK. This is telling you that the pqact.conf action is incorrect. Right off, the most likely things are: o a space before the MCIDAS on the first line of this action o use of spaces between MCIDAS and ^pnga2area; this white space must be a tab o you listed '^pngarea' above, the action should be '^pnga2area ...'. >I got the same results when I reconfigured the pqact.conf file to use >the ldm-mcidas 7.6.4 lwtao3 decoder so it seems as if there may be a >system incompatibility problem (we have been using 7.1.1). The incompatibility is most likely the use of spaces where tabs are required. For instance, in a pqact.conf action like: MCIDAS ^pnga2area Q. (..) (.*) (.*) (.*) (.*) (........) (....) PIPE -close pnga2area -d /data/ldm/mcidas -r \1,\2 the following should be tabs: o white space between MCIDAS and ^pnga2area o white space before PIPE o white space between PIPE and -close o white space before pnga2area All other white spaces are spaces. Please remember that after making changes in pqact.conf, it is strongly advised to run 'ldmadmin pqactcheck'. Until this comes back with no errors, things are guaranteed to not run. Also, after making any changes to pqact.conf, you have to send a HUP signal to pqact to tell it to reread pqact.conf. For current LDM distributions, this can be done with a: ldmadmin pqactHUP For older versions, you have to get the process ID of pqact and send it a 'kill -HUP'. >One other piece of information. When I run the server with the pnga2area >decoder and then run watch, pqutil finds the decoder and gives me >header information for the products that looks correct. An 'ldmadmin watch' is watching the arrival of products in your LDM queue. It is the equivalent of doing a: notifyme -vxl- This will tell you that products are getting to you correctly, but will not tell you about problems running actions in pqact.conf. What would inform you of possible problems is a: ldmadmin tail >Thanks for your help. It would be helpful if you sent along the pnga2area action that you are putting in your pqact.conf file. This way, we can review it and note where tabs are needed and see if there is anything else amiss with your entry. >Mary Lynn Baeck >I can be reached by email or by phone at (609) 258-2274 If a quick reedit of pqact.conf doesn't work, please let me know and we can discuss what is going on by phone. Tom Yoksas >From address@hidden Wed Sep 20 06:40:24 2000 >Subject: Re: 20000914: Unidata-Wisconsin (MCIDAS) images broadcast cessation >(cont.) ###### For Tom Yoksas ###### Tom - We are up and running with the LDM server on our Linux machine and have taken the UNIX machine LDM server down. Thanks for your help. Mary Lynn Baeck
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