Hi,
I create a new istance Oracle PMA and then:

CREATE TABLESPACE PMA1 DATAFILE 'c:\...\PMA01.dbf' SIZE 500M REUSE DEFAULT STORAGE (INITIAL 10240 NEXT 10240 MINEXTENTS 1 MAXEXTENTS 256 PCTINCREASE 0) ONLINE;

CREATE USER PM IDENTIFIED BY PM DEFAULT TABLESPACE PMA1 TEMPORARY TABLESPACE TEMP;

imp system/manager@PMA fromuser=PM touser=PM file=C:\...\xxxxx.dmp log=C:\...\imp_pm.log

I get this error on one table:

IMP-00003: ORACLE error 1658 encountered
ORA-01658: unable to create INITIAL extent for segment in tablespace PMA1
IMP-00017: following statement failed with ORACLE error 1658:

I tried with:
CREATE TABLESPACE PMA1 DATAFILE 'c:\...\PMA01.dbf' SIZE 500M EXTENT MANAGEMENT LOCAL UNIFORM;

but I get the same error on another table

How can I resolve my problem?

Thanks
Raf