11
Heading :Regular Expression Error : 
Trailing_Chars :Extra characters found after a right anchor at <>!
Unexpected_Char :Unexpected character '<>' found!
Missing_Brace :The character '<>' found instead of a right brace!
Missing_Dup_No :The character '<>' found instead of a count!
Missing_Right_Paren :Missing right parenthesis at <>!
Missing_Right_Bracket :Missing right bracket at <>!
Escape_Last :Escape character at <> - string end!
Empty_Brackets :Empty bracketed expression at <>!
Unexpected_Termination :Further characters expected after <>!
Invalid_Class :Invalid class name <>!