If PDF Compare encounters a problem during the compare process, one of the following messages may appear:
Error message | Possible causes |
|---|---|
| The files that you selected for comparison may have the same file name and location. You can select two files with the same file name, but one file must be in a different folder. |
| The workstation may not have enough available memory to generate the temporary comparison file, or available disk space may be low. |
| The file specified in the error message may be corrupt, locked, or already in use. Alternatively, the selected file may not be a PDF file. PDF Compare can only compare PDF files. |
| The two PDF files that you have selected for comparison do not have the same number of printed pages. |
| If you are comparing two separated PDF files, the separation order in one file may not match the separation order in the other file. If this is the case, PDF Compare cannot compare the two files. |
| One or both of the selected files contains RGB images. PDF Compare does not support RGB images. |
| Some font resources may not have been properly installed or were removed from the Acrobat folder, or permissions may have been set such that the required file cannot be read. |
| There may be no PDF Compare licenses installed on any of your servers, or the network cable may be unplugged from the workstation. |
Once PDF Compare completes the comparison process and generates the temporary comparison file, the comparison file appears in the Adobe Acrobat window. In the upper-left corner of the file, an Information 
or Error 
icon appears.
Information icons appear when the comparison was successful and no problems were encountered. Error icons appear when the comparison encountered a problem.
When an Information icon is visible, you can click it to open the Processing Details dialog box that displays details about each of the PDF files being compared. (Note that you must click the Acrobat Hand tool before you can click the icon to open the dialog box.)
The details of the dialog box include the number of objects that are unique to the original PDF file, unique to the revised PDF file, and common to both. If you chose to highlight ink differences instead of object differences when comparing the files, the dialog box also provides details about the separations that make up each file and the percentage of change for each separation. Separations that remain unchanged between PDF files are listed with a Difference of Identical. If you chose to ignore Kodak-generated traps when comparing the files, the dialog box also indicates that traps were ignored.
Processing Details dialog box
Tip: If the Information icon is not visible, select Comments > Show Comments List.
In addition, the dialog box may also contain the following messages:
Information message | Meaning |
|---|---|
| The same separations are not contained in both PDF files. For example, the original PDF file might have CMYK separations only while the revised PDF file also has spot colors. |
| One of the PDF files is missing the font specified in the information message. |
| There are no objects common between the two PDF files. |
| There are no object differences between the two PDF files. The revised PDF file may not actually have been changed from the original. |
| When specifying the two PDF files to compare in the Prinergy Compare Documents dialog box, you selected Ignore Kodak generated traps. |
When an Error icon is visible instead of an Information icon, the dialog box opens automatically to display details about the problems that PDF Compare encountered. The following error message may appear:
Error message | Meaning |
|---|---|
| The workstation may not have enough available memory to generate the temporary comparison file. |