RunError when using Purify

[ZhxingLi]

Hi, I'm now playing around with purify. I just installed the development version, and tried to run through the example provided in the data filefolder. But it always reports the same error, even after I change the data to my own .fits file :

purify::critical Input visibilities will be generated for random coverage.
purify::debug Reading fits file /home/mavis/software/purify/data/images/M31_512.fits
purify::debug Axes 2
purify::debug Dimensions 512x512x1x1
terminate called after throwing an instance of 'std::out_of_range'
what(): vector::_M_range_check: __n (which is 0) >= this->size() (which is 0)
Aborted (core dumped)

Do you have any idea waht the possible problem is? Could you advice? Thanks for your time.