Hi Raj,
Seems like valid from info object length was too small. pls check the length of valid from date. its need to same length ecc field. Check at ecc side how much its have valid from date source field and same length need to have at bw info object of valid from date.
Date field/info object always will be 8 or 10 digit length. if your bw info object have less than that pls change the length to required one and try to reload.
Thanks