exp - imp eliminate the segment extent, so if you have a segment made on 10 extnets...you'll have e segment made on 1 extent (as sum of old extents). So increase the tablespace size and retry the import (only of the table failed...after droping the new one). i don't sugest you change the initial extent of the index because in creation it will take all the extents necessary for the creation ...(and prob. you'll take error)