Search notes:

ORA-01990: error opening password file …

No password file

C:\> sqlplus / as sysdba
…
SQL> alter user sys identified by "iAmTheDBA!";
…
ORA-01990: error opening password file ''

SQL> select username, sysdba from v$pwfile_users;
…
no rows selected
In PowerShell: 
C:\> '1AmThedba!' |
orapwd    `
   file=$env:ORACLE_BASE/database/PWD$env:ORACLE_SID.ora `
   sys=y
Then: 
C:\> sqlplus sys/!amTheSysdba! as sysdba
…
SQL> alter user sys identified by "1amTheDBA,2!";

User altered.

See also

Other Oracle error messages

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1759473869, '216.73.216.42', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/errors/ORA-01990_error-opening-password-file(62): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78