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https://issues.apache.org/jira/browse/PDFBOX-5915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17902118#comment-17902118
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Andreas Lehmkühler commented on PDFBOX-5915:
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I've have another idea in my mind, but I'd like to verify it first. Do have a
sample pdf?
> false "Unknown charstring command in glyph" messages
> ----------------------------------------------------
>
> Key: PDFBOX-5915
> URL: https://issues.apache.org/jira/browse/PDFBOX-5915
> Project: PDFBox
> Issue Type: Bug
> Components: FontBox
> Affects Versions: 3.0.3 PDFBox
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Minor
> Fix For: 3.0.4 PDFBox, 4.0.0
>
>
> I'm often getting "Unknown charstring command in glyph" messages. I took the
> time to find whether these are real, and they're not. They happen because of
> type2 charstrings that start with 19 or 20. These are passed to
> {{CharStringCommand.getInstance(value)}} where they are classified as UNKNOWN
> either because the value array is more than 2 or because a 2 byte command
> doesn't result in a known value. However 19 and 20 are 1 byte commands
> (hintmask and cntrmask, which we ignore) so this must be changed.
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