Why is Docear showing a “The access to the file is blocked” warning?

To import new annotations, Docear needs write access to a PDF. Write access is needed because Docear writes unique IDs to each annotation in the PDF when the annotations are imported. This is necessary because some PDF readers occasionally overwrite the standard annotation IDs. However, most PDF viewers block write access for a PDF that […]

Why is PDF-XChange Viewer or Adobe Acrobat Pro not recognized?

Sometimes, PDF-XChange Viewer is not recognized by Docear. There are three potential reasons. You did not install PDF-XChange Viewer. Please note that PDF-XChange viewer it not installed by Docear automatically. It needs to be installed by you. You did install the wrong PDF viewer. Tracker Software offers several PDF viewers with nearly the same name. […]