One can check if the file is alright for publishing by using preflight, without having to make a package. 🙂 The export problems have nothing to do with the quality of the pdf. Smallest size gave an error too.
Marike - graphic designer, desk top publisher, web designer, dog owner, horse owner, fun person 😉
Since the last update (18.2) I suddenly can't export to pdf with one object being linked to another InDesign file.
In a magazine i've always had the cover linked to another InDesign file where i edited the cover seperately from the magazine. Suddenly I could not export to pdf, getting a error message. Then I made a pdf from the cover and placed the pdfs in the magazine. Then i could export to pdf. I checked with preflight, there were no font issues or colour issues in the cover. The problem really occured directly after the update.
Open the IDML in InDesign Save the file as a new InDesign file with a new name See if the issue persists.
As you have 3 linked InDeisgn files you may have to perform the same steps and update the 3 links in your document.
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Try resetting your preferences:
Windows: Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files. macOS: While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files. A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog. Further info and instructions here if needed: https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html