[scipion-users] DM4 to MRC conversion flips gain reference?

[Matt H. <ma...@ms...>]

Our users report that the motioncor2 protocol flips the gain reference
when converting from .dm4 to .mrc.  I see an option in the MC2
protocol to flip the gain reference back.  However, I'm wondering why
the gain reference is flipped in the first place.

This code seems relevant:

https://github.com/I2PC/scipion/blob/d1a60f69960d1079bbbecde5bf3f5f4017b36927/pyworkflow/em/convert/image_handler.py#L178

However, since *.img files are not involved I would guess the "else"
branch of that statement would be followed, meaning that Xmipp
performs the conversion.

Any ideas how to troubleshoot this?

Matt