A password longer than 21 characters cause Second Pass login error when logging into Stat Windows client. I tried password change with passwords of different length:
ABCDEFGHIJabcdefgh (19 characters) - no issues
ABCDEFGHIJabcdefghi (20 characters) - no issues
ABCDEFGHIJabcdefghij (21 characters) - no issues
ABCDEFGHIJabcdefghijk (22 characters) - second pass login error
ABCDEFGHIJabcdefghij (21 characters) - no issues again.
Supposedly, there should not be any restriction on STAT database passwords because LOGINPWD column in STAT_LOGIN is varchar2(100 bytes), so 20+ character password should not be a problem.