Anyone using the software StarCalc ?(http://vsnet.m31.spb.ru/StarCalc/main.htm) I have no succeed to load the GSC Cat. in to the program, can someone tell me how to do? I using the GSC at: http://adc.gsfc.nasa.gov/pub/adc/superseded/1/1220/GSC/ Because i use this GSC files also for Cartes du Ciel and HNSKY I have The GSC on my hd like = C:\GSC and the Tables folder like = C:\GSC\Tables Grateful for help Hans-Goran