I am looking into editing the stl1 and ci values in the ICMCLhif1INIT files.

When I split and remerge the file with eccodes like the following:

grib_copy ICMCLhif1INIT '[shortName]_out'

grib_copy -B "dataDate asc" *_out ICMCLhif1INIT_edit

I obtain a file which is identical according to grib_compare -rf ICMCLhif1INIT_edit ICMCLhif1INIT, but when I input it into OpenIFS, I obtain an error that an unexpected key is encountered.

Does anyone have any insight or experience?

Thank you in advance