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Greetings Kathryn, Which files/variables are you truing to view? Note that some variables only have one time associated with them (like Water Equivalent of Accumulated Snow Depth in the RAP output). I just pulled down a 12Z RUC file (well, it's really a RAP file) and didn't have any issues: http://mtarchive.geol.iastate.edu/2012/05/06/gempak/model/2012050612_ruc130.gem If you send a link to some examples I'll check them out here. Cheers! Sean > Full Name: Kathryn Bost > Email Address: address@hidden > Organization: department of atmospheric science > Package Version: > Operating System: > Hardware: > Description of problem: Hello unidata, > > I am currently having an issue using IDV. I have downloaded Gempak files from > Iowa State Univ. and am viewing them on IDV. When I pick a parameter to view > there is no option to select a time. It seems to default to the 00Z run. I > need to see the 12Z run. Is there any way for me to do this? > > Thank you! > > Ticket Details =================== Ticket ID: JXV-214316 Department: Support IDV Priority: Normal Status: Open