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Hi Remi, I did the modifications from the last email and then your missing parameter was found. The fix will be in the next IDV release but I don't know when that will happen. I'm not familiar on how the IDV reads in parameter tables so I don't know why it's not working for you. This report has been turned over to the IDV folks. The test file had center 85 sub-center -1 and table version 2, it looks like you were using table version 1. That might be your problem. RObb... float Pseudo-adiabatic_pot._temperature(time=1, isobaric=1, lat=121, lon=240); :long_name = "Pseudo-adiabatic_pot._temperature (Accumulation for -12 hours Intervals) @ isobaric"; :cell_methods = "time: sum"; :units = "K"; :missing_value = -9999.0f; // float :GRIB_param_name = "Pseudo-adiabatic_pot._temperature"; :GRIB_param_short_name = "EPOT"; :GRIB_center_id = 85; // int :GRIB_table_id = 2; // int :GRIB_param_number = 14; // int :GRIB_param_id = 1, 85, 2, 14; // int :GRIB_product_definition_type = "Accumulation"; :GRIB_level_type = 100; // int :GRIB_VectorComponentFlag = "easterlyNortherlyRelative"; Ticket Details =================== Ticket ID: NRV-229678 Department: Support IDV Priority: High Status: Open