This are valid formats:
Example:
BlastFurnace.addRecipe(output, input1, input2, durationTicks, euPerTick, temperature);
My Script:
BlastFurnace.addRecipe(<gregtech:gt.metaitem.01:2819>, <gregtech:gt.metaitem.01:2865>, <gregtech:gt.metaitem.01:2020>, 500, 480, 2000);
So whats wrong than?