MiKTeX and proTeXt ⇒ Always "latex" compilation warnings....

[jiapei100]

I always met the following 3 warnings in my log file, I'm just wondering how can I clean my latex compilation?

1) LaTeX Font Info: Redeclaring font encoding OML on input line 567.
LaTeX Font Info: Redeclaring font encoding OMS on input line 568.

What does redeclaring mean? How does this happen? How to clean these kind of redeclaring??

2) LaTeX Font Info: Font shape `OMS/cmr/m/n' in size <14.4> not available
(Font) Font shape `OMS/cmsy/m/n' tried instead on input line 45.

Font shape is not available, latex automatically helps to pick up a similar font shape with available size. However, where can I specify my own type of fonts in .tex file?

3) (Dissertation.bbl [67]
Missing character: There is no ?in font cmti12!
Missing character: There is no ?in font cmti12!
[68

]
Missing character: There is no ?in font cmr12!
Missing character: There is no ?in font cmr12!
[69]
Missing character: There is no ?in font cmr12!
Missing character: There is no € in font cmr12!
Missing character: There is no ?in font cmr12!
[70] [71] [72]
Missing character: There is no ?in font cmr12!
Missing character: There is no € in font cmr12!
Missing character: There is no ?in font cmr12!
[73] [74]
Missing character: There is no ?in font cmr12!
Missing character: There is no € in font cmr12!
Missing character: There is no ?in font cmr12!
[75] [76]
[77]
Missing character: There is no ?in font cmr12!
Missing character: There is no ?in font cmr12!
Missing character: There is no ?in font cmr12!
[78] [79] [80] [81] [82]) [83] (Dissertation.aux) )

How come I miss characters in font cmti12 or cmr12? From the above segment of .log file, can I say that all missing character problems are coming only from the .bib file? But, if I open a .bib file with WordPad, I could see all the characters in a correct way. How can I manage to find those unrecognizable characters? And, finally, how can I remove the above annoying "missing character" warnings??

Best Regards
JIA Pei

[localghost]

Please provide a minimal working example (MWE) that shows this behaviour. Otherwise it's difficult to help without knowing what code causes these warnings. Could be a matter of font encoding.


Best regards and welcome to the board
Thorsten¹