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Hi Stefan- > Thanks for the help. Unfortunately, all of the above didn't work. If I > change all the parentheses to brackets in the file, none of the > variables show up in the field selector in IDV. That's odd. I tried reloading the > data without the byteswapped tag and variables still were plotted as > 'noise'. Attached is the ARWpost theta and relative humidity at 2m > attempt. I couldn't capture the image through IDV, whenever I did all > it did was show up as black. So this is a print-screen shot. I also > sometimes get the random error: "negative offset error"? It happens > randomly and isn't related to any particular variable. What is odd is > that the domain and time steps are recognized correctly by IDV, > including the field selector showing the variables. It seems there is > some communication issue between IDV, the ctl file and the dat file. I > would use WRFpost to create grib files, however I don't have space to > keep both grib and data files(some of my output is over 20GB). Thanks > again for your help! How large is one timestep? If less than 2Gb, could you upload it to: http://motherlode.ucar.edu/repository/alias/idvupload ? Also, what version of IDV are you using? And finally, could you cc: address@hidden on your reply. For some reason, the I'm not getting your responses. Thanks. Don Ticket Details =================== Ticket ID: LCA-261543 Department: Support IDV Priority: Normal Status: Open