I have file name as GKL_0456_CFT_CF_20240226.dat and JQBF305_0556_CFT_TF_20240225_d.dat
I want to extract date string from both file name.

as result from first file name: 20240226

as result from second file name: 20240225

I have use Pattern as “d{8}”
but is says no match found