CGI エラー

エラーメッセージ：
Can't use 'defined(%hash)' (Maybe you should just omit the defined()?) at ./ym_lib/jcode.pl line 543.

CGI エラー

エラーメッセージ：
Can't use 'defined(%hash)' (Maybe you should just omit the defined()?) at ./ym_lib/jcode.pl line 543. Compilation failed in require at y_mail.cgi line 43.