i am doing calculation in internal table as the result i am getting the negetive value stored in in internal table,
But when i am display this table in table Control it give the run time error
Screen name.............. "ZMPPR_MAT_ISSUE_PLAN"
Screen number............ 9000
Screen field............. "WA_MAT-ALLO_QTY"
Error text............... "FX015: Sign lost."
if i have a WA_MAT-ALLO_QTY positive value no error
if WA_MAT-ALLO_QTY its has a negetive then RUN TIME ERROR
PLEASE SOLVE MY PROBLEM