This is a problem relating to costing of HALB material.. While doing process order for a fert material (BOM of FERT material contains a HALB and two ROH materials) a window occurs while saving ' Error when calculating costs, see log'. Why is this happening? I have checked the BOM , all components are subjected to cost relevancy (X). For HALB material no values are manually maintained in planned price 1,2,3 fields in Costing 2 view of material master. Do we have to manually maintain or will it be taken from the ROH materials in HALB BOM. For ROH materials values are comin in planned price 1,2,3 fields in Costing 2 view . If this has to be done what is the configuration. The ultimate issue is while running process order for FERT material no costing is happening for HALB material.Pls share your suggestions. Rewards assured.