| Error | Error description |
|
| Text is smaller than minimum size |
| optional |
| Font is not valid | At least one embedded font is syntactically incorrect. |
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| Font not embedded | Font is not embedded in the PDF file. | optional |
| Image is not valid | The data stream for at least one image is syntactically incorrect. |
|
| Image resolution too low |
| optional |
| White text is not set to knock out | White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists text objects inside the TrimBox using white. |
|
| White text is not set to knock out (stroked) | White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists text objects inside the TrimBox using white for stroke. |
|
| Line width is less than minimum | Line width less than minimum. These "hairlines" may cause problems when being printed. | optional |
| Image is too close to the edge | Image objects too close to edges | optional |
| Syntax problem: Unknown operator in page description | This condition filters for operators that are not defined in the PDF specification and almost always will cause errors. |
|
| Text is too close to the edge | Text objects too close to edges | optional |
| Interactive form field inside page area | Determines whether interactive form fields are located (completely or partially) within the areas designated by the BleedBox (trim size of a page plus bleed area) or TrimBox (trim size of a page). PDF/X prohibits interactive form fields inside this area. |
|
| Effective ink coverage is too high | Larger regions on this page have a total area coverage of more than maximum. This can cause problems because a large amount of ink is applied to the paper. For visualizing the respective regions pdfToolbox or the Output Preview of Acrobat with an activated total area coverage check of same threshold can be used. This check includes all page objects including images and checks an effective area of 15 x 15 millimeters. | optional |
| Please check Document size | The artwork does not match the size defined for this product. | optional |
| Document is encrypted | Even if an encrypted file does not require a password, many applications (incl. Photoshop and InDesign) won't allow one to do anything with the file. In addition, PDF/X and other PDF-based ISO standards prohibit encryption. |
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| Document is damaged and needs repair | The PDF document is damaged. While tFLOW always tries to repair the document when it is opened, there is no guarantee that the document can be processed reliably. |
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