Common validation error messages from PDF to PDFA conversion

Title	Common validation error messages from PDF to PDFA conversion
Detailed description	The validation error messages found from two pieces of validation software when performed on the same [file: ]From PDFBox Preflight: Invalid font definition Syntax Error: invalid float range in Number operand Invalid color space... From Adobe Preflight CIDset in subset font is incomplete Font not embedded Syntax problem: Real value out of range (too high) (also commonly get the other extreme - too low) A detailed description of the Issue. The Issue *MUST* focus on the busines or preservation driven challenge, and should not assume or prescribe a particular solution. Describe what the Issue is, why you have the Issue, and what your requirements are for a Solution. For example, it might be important that a technical solution runs on UNIX, or has a GUI front end and is easy to use, or needs to process records efficiently as the Dataset is large.
Issue champion	Who owns the issue? Type "[" and then your name to use autocomplete. This creates a link to your user profile on the wiki, including your contact details, so is the best way to add your name..
Other interested parties	Any other parties who are also interested in applying Issue Solutions to their Datasets.
Possible Solution approaches	Brief brainstorm of possible approaches to solving the Issue. Each approach should be described in a single sentence as part of a bulleted list. Further detail can go in a dedicated Solution page.
Context	Details of the institutional context to the Issue.
Lessons Learned	Notes on Lessons Learned from tackling this Issue that might be useful to inform digital preservation best practice .
Datasets	Reference to the appropriate Dataset page, by hyperlink. Note that all Issues *MUST* be linked to at least one Dataset!
Solutions	Reference to the appropriate Solution page(s), by hyperlink.