PIV Error 4012 'CAC NOT Found in Reader'
Symptoms
PIV activation throws Error 4012.
Likely cause
Card not inserted or not detected when the activation step runs.
Fix
1. Insert the CAC and try again.
2. If still failing, follow the PIV activation steps with ActivClient instead of the built-in utility.
Sourced from militarycac.com. Rewritten for clarity.
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