Pl post what values NLS_LANG variable was set to during export and import. Pl also post the complete export command used and the first/last 15 lines of the export log
exp system/manager file=d:\cgl.dmp owner=cgl, even i set character set before export but no impact
For the export, set NLS_LANG to US7ASCII. On the import command, the "fromuser=system" should be changed to "fromuser=cgl"
Thnx, problem solved .. i used fromuser=cgl.