Arts and Motricity in Child Education Schedule

Erro

ORA-06512: at "ESE_SI.PERIODOS_AULAS_WEB", line 99 ORA-06512: at "ESE_SI.HORARIOS_WEB", line 18 ORA-06512: at "ESE_SI.HORARIOS_GERAL", line 2551

ORA-06502: PL/SQL: numeric or value error: character to number conversion error