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In a TrueType/OpenType font, the<b> .notdef</b> glyph is used as a substitute where a character code does not map to a real character in the selected font.<br />
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So the implication is that your document contains at least one character whose character code (code-point) does not exist in the current font.
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In a TrueType/OpenType font, the .notdef glyph is used as a substitute where a character code does not map to a real character in the selected font.

So the implication is that your document contains at least one character whose character code (code-point) does not exist in the current font.

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I have a 2 page document as &nbsp;pdfs file format(PDFA/2b). 0ne page was fine, but one has garbled type. A preflight check shows this error for <br />
&quot;Character references .notdef glyph&quot;<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/08_w31/1185271/Test.png" target="_blank" class="file-inline" title="This is error i am getting (66 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Test.png</a>
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Test.png

I have a 2 page document as  pdfs file format(PDFA/2b). 0ne page was fine, but one has garbled type. A preflight check shows this error for 
"Character references .notdef glyph"

How to reslove &quot;Character references .notdef glyphs&quot; error

A font is a particular size, weight and style of a typeface. Each font is a matched set of type, one piece (called a "sort") for each glyph, and a typeface consists of a range of fonts that share an overall design. With the advent of digital typography, font is frequently synonymous with typeface, although the two terms do not necessarily mean the same thing. In particular, the use of "vector" or "outline" fonts means that different sizes of a typeface can be dynamically generated from one design. Each style may still be in a separate "font file" -- for instance, the typeface "Futura" may include the fonts "Futura roman", "Futura italic", "Futura bold" and "Futura extended" —- but the term "font" might be applied either to one of these alone or to the whole typeface.

How to reslove &quot;Character references .notdef glyphs&quot; error

How to reslove "Character references .notdef glyphs" error