Question Christopher Blair · Jan 23, 2017 Synchronization failed: Invalid header in /Encounter Interface/VFDXXXXXX.int Hello, I've checked past posts and don't see the answer. Hope someone can help. I'm working with our commercial version of VistA. Cache 2016.2. I've connected to the instance and copied a few M routines to my local Atelier project. I edited a comment in the file and attempted to save/compile the routine back to the server. I'm getting Synchronization failed: Invalid header in /Encounter Interface/VFD....... Is there something I'm missing? Thanks in advance. #Caché 0 4 0 647