I found a bug in the MCIP v5.1 source code
In Line 535 of metvars2ctm.f90, the code is
xclay_px(:,: ) = clay_px (sc:er,sr:er)
which should be
xclay_px(:,: ) = clay_px (sc:ec,sr:er)
It won’t crash MCIP, but can lead to some warning. Please correct it in the release version.