CDO

Hello,
Joana here,
I am trying to compute the heat wave index for EOBS data (1950 - 2016).
I am using the following

cdo -b f32 eca_hwdi -addc,273.15 tx_0.25deg_reg_v14.0.nc -runmean,5 -addc,273.15 tx_0.25deg_reg_v14.0.nc outfile.nc

EOBS data come in Celsius hence I add 273.15 to convert to Kelvin.

I have an error :

cdo eca_hwdi (Abort): Input streams have different number of time steps!
cdo: posixio.c:376: px_rel: Assertion `pxp->bf_offset <= offset && offset < pxp->bf_offset + (off_t) pxp->bf_extent' failed.

According to the notes: TXnorm is calculated as the mean of maximum temperatures of a five day window centred on each calendar day of a given climate reference period.
Any feedback would be much appreciated
Regards
J