The VAH system is no stranger to difficulties with electronic health records. The VA itself is a very large health system as a standalone division of health care for government programs. The latest iteration being developed by Cerner, is to make the Depatment of Defense electronic health record interoperable with the Cerner VA EHR.
Each system has a mutiplicity of clinics, hospitals and outpatient facilities to be supported. During the past decade most EHR vendors have struggled to adopt interoperability across vastly different EHR systems. Some success has been attained by large vendors such as Epic within their own ecosystem. Epic has been very successful with it's portal, "My Chart" which allows any hospital or clinic to share it's EHR with any other facility using Epic's EHR. 
I can attest to the validity of it's portal, having used it for the UCLA, Scripps hospital, Cleveland Clinic, and Mayo Clinic as well as my own physicians locally.
Cerner EHR is now a subsidiary of Oracle. Oracle offers it's own interoperable system amongst Keck Medicine of USC, Boston Children's Hospital, Southwest General Health Center. St John's Hospice, and connects with CommonWell Health Alliance. Cerner was instrumental in forming the Commonwell Health Alliance.
The VA is a political football. Each change of administration has a bullet point presentation claiming about cost over runs for the "new" VA EHR. The VA seems to use the Elon Musk model of developing rockets. Launch it and see if it blows up. Analyze when and why, fix it and move on. It is the VA adaptation of recycling the EHR. During the last two decades many iterations of the VA EHR have undegone RUD (Rapid Unscheduled Disassembly.)
The details of the development program for VA IT are outlined here
