I am getting this error while uploading the data to the database. On the same server I 9iAS is running. I am unable to shutdown the database.

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ERROR at line 1:
ORA-01116: error in opening database file 2
ORA-01110: data file 2: '/delivery/datafile/Deliverydatafile.dbf'
ORA-27041: unable to open file
Linux Error: 1: Operation not permitted
Additional information: 3

ORA-06512: at "ESLDBA.UPLOADDELIVERY", line 83
ORA-06512: at "ESLDBA.UPLOADDELIVERY", line 319
ORA-06512: at line 1

os=linux RH 7.2
oracle: 9.0.1
9iAS: 1.0.2.2.1