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Daikan, The likely problem here is the total_precipitation field has a different time dimension than the other fields (e.g., temperature). Best Wishes, Unidata IDV Support > Full Name: daikan > Email Address: address@hidden > Organization: china national meteorology center > Package Version: 4.1u1 build date:2013-11-13 08:05 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_4.1u1\jre version: 1.6.0_43 > j3d:1.5.2 fcs (build4) > Description of problem: Hi, guys: > I read series GFS's forecast file with aggregate time grib files. > But the total_precipitation just show one forecast hour, others, like > temperature, height have no problem. So what's the problem? > Daikan > > Ticket Details =================== Ticket ID: NGW-861413 Department: Support IDV Priority: Normal Status: Closed