I'm going around in circles on this. Does anyone have any leads? Please see below:

SQL> connect / as sysdba
Connected to an idle instance.
SQL> startup mount
ORACLE instance started.

Total System Global Area 135338868 bytes
Fixed Size 453492 bytes
Variable Size 109051904 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
Database mounted.
SQL> Recover datafile 'E:\ORACLE\ORADATA\TRAIN1\SYSTEM01.DBF';
Media recovery complete.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 3 needs media recovery
ORA-01110: data file 3: 'E:\ORACLE\ORADATA\TRAIN1\CWMLITE01.DBF'