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BSSPcmip6 pio die/overflow error

Hi all, I am running a BSSP585cmip6 case, a totally default one. I got an error as below:

pio_support::pio_die:: myrank= -1 : ERROR: nf_mod.F90: 1508 :
Overflow when type cast to 4-byte integer.

It should be happening when initializing the clm module, interpolating the initial files for CMIP6(crop?) experiments probably (I do not have this issue when I run a BSSP585 case without CMIP6).

I understand this error is due to mismatched data types, such as when casting a 2-byte variable to 4-byte. However, I do not know how to debug it. Appreciate it if anyone can offer help~