Illustrator does not save correctly as PDF x 4

[albert6C2C]

Does anyone know why Adobe Illustrator does not save a PDFx4 correctly? Since a few weeks when I save a .ai file to PDFx4, it is not generated correctly. When I open this PDF in Acrobat it does not appear as PDFx4.
Do you know if there has been a problem with the new versions? I have returned to the 24.3 that before gave no problems and now it keeps giving me this error.

[Monika Gause]

So when doing a Preflight check in Acrobat, the file doesn't show up as X4?

[albert6C2C]

correct,

now I have seen that the version of Acrobat Pro (21) if you open the Distiller does not allow Distil as PDFX4, and if you try to load a PDFx4 joboption it gives an error.
Could the new version of Acrobat mistakenly not have the pDFX4 as a distiller option? I understand that it links to adobe applications.

[Monika Gause]

Distiller cannot make PDF/X-4 since PDF/X-4 can contain transparency and Distiller can't produce that.

So you are using Distiller?

Please describe your file and what exactly you are doing stepby step.

[albert6C2C]

I don't use Distiller, I use adobe illustrator.
When saving as PDF, there is the option to save as PDFx4 among other PDFx options.
Well, when saving as PDFx4, illustrator does not generate a PDFX4.
Until now there were no problems, we have been generating pdfx4 without problems with illustrator for more than 3 years.
My colleagues also have this problem. Either it is a error in Illustrator (I have version 24.3, my partner has a more recent version) or we thought that Illustrator could use the Distillier allogarithm, that's why this comment from Distiller.

[Monika Gause]

When was the last time you rebooted the computer?

Try and uncheck "Save in background" in the preferences.

Do you save on the local harddisk? Or directly to a network, a synchronized folder etc.?

If it still doesn't work when saving on the harddisk, try and reset the preferences. Rename the folder so it can be reverted. https://helpx.adobe.com/illustrator/using/setting-preferences.html

[albert6C2C]

When was the last time you rebooted the computer? Everyday

Try and uncheck "Save in background" in the preferences. - OK

Do you save on the local harddisk? Or directly to a network, a synchronized folder etc.?

I save to the hard drive
I have reset the preferences and We still have the problem

[Monika Gause]

Please post more details.

Especially the preflight check report.

[albert6C2C · Accepted solution]

We have fixed the problem.
We do not know the reason for the change, maybe when the software, was updated but in the Edit menu - Color settings - settings: the Emulate Adobe Illustrator 6 option was activated.

This option does not allow saving PDFs as PDFx4.
We have changed this option for a custom one and now it works perfectly.

Anyway, thanks for the help

[Doug A Roberts · Accepted solution]

This is a recent bug occuring in combination with the last Photoshop update:

https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/42892902-illust...

[albert6C2C]

Thanks Doug
Software updates always bring surprises 🙂