in reply to Re^2: Failed to check if registry key is exist
in thread Failed to check if registry key is exist

Did you ever figure this out? I'm able to reproduce this as well.
  • Comment on Re^3: Failed to check if registry key is exist

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Re^4: Failed to check if registry key is exist
by Anonymous Monk on Jan 22, 2015 at 20:27 UTC
    Answer found on stack overflow. Wow64 is the issue - use the system native version of reg.exe %Windir%/sysnative/reg.exe
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