Are the pdf's generated from a task server? If you setup your tasks to run on a background server and not the PC they were initiated from make sure it has a supported video card as this has been know to produce this issue. Also if you go to the Administration tool and expand add-ins what version of the task add-in do you see, and what version of EPDM are you on?
The pdf are generated on my machine
the EPDM version is 13.01.0615
the SWTaskAddIn is 2013010615
Ionut, If you are using a dedicated task host other than the users machine, make sure you have all the system options and user setting setup correctly: cache any templates that maye be in the vault, make sure any customizations (GTOL file) are installed and etc. Also, look at the following knowldege base solutions: S-046962, S-538578 and S-538609 Regards, Joy