Not necessarily. Unwrapped phase is valid and easier to handle because separate unwrapping logic is not required, though it should exist for response files with wrapped phase.
Phase wrapping is decade easier than unwrapping, and unwrapping with simple logic becomes unreliable when excess delay (in phase response) is long enough compared to frequency resolution.
Unwrapped phase helps at least interpolation and extrapolation (re-scaling of frequency axis), smoothing and group delay calculation.
Wrapped phase (with decent or removed excess delay) is de facto standard in response files. Attached sample file HOLMImpulse.frd is raw result of FFT beginning at 0 Hz and therefore not so typical, small and fast as response file could be.
Unwrapped phase helps at least interpolation and extrapolation (re-scaling of frequency axis), smoothing and group delay calculation.
Wrapped phase (with decent or removed excess delay) is de facto standard in response files. Attached sample file HOLMImpulse.frd is raw result of FFT beginning at 0 Hz and therefore not so typical, small and fast as response file could be.
Seems to work (I had to change scale):
Thanks , That change of scale made it work.
It's working for me too.
Thanks .... 
When exporting FR as text from HOLM, I always add 99dB in the adjustment window before export. That brings the numbers up to a range suitable for XSim and Rephase. Remember to remove the 99dB boost in HOLM, or you'll be way off the scale.
99.9dB is the max allowed, IIRC - so I simply use 99
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